Clinical Locations
Sugar House Health Center
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Board Certification
American Board of Internal Medicine (Internal Medicine)American Board of Internal Medicine (Internal Medicine)American Board of Internal Medicine (Sub: Hematology)American Board of Internal Medicine (Sub: Hematology)Educational Commission for Foreign Medical GraduatesLicentiate of the Medical Council of CanadaRoyal College of Physicians and Surgeons of CanadaRoyal College of Surgeons of CanadaPatient Rating
4.8 /5( out of 65 reviews )The patient rating score is an average of all responses on our patient experience survey. The rating averages scores for all questions about care from our providers.
The scale on which responses are measured is 1 to 5 with 5 being the best score.
Patient Comments
Patient comments are gathered from our patient experience survey and displayed in their entirety. For the convenience of our visitors, some patient comments have been translated from their original language into English while preserving their original meaning as accurately as possible. Patients are de-identified for confidentiality and patient privacy.
November 24, 2025SUGAR HOUSE HEALTH CENTERGood experience [TRANSLATED]
November 21, 2025SUGAR HOUSE HEALTH CENTERDr. Parker is a highly knowledgeable practitioner who is low key and informative. His explanations and instructions are straightforward and understandable.
November 13, 2025SUGAR HOUSE HEALTH CENTERI find Dr. Parker VERY good to work with. His demeanor is very soothing, open and helpful.
November 05, 2025SUGAR HOUSE HEALTH CENTERDr. Parker was most attentive and knowledgeable about my condition. He gave me a generous amount of his time to explain his plan of care for me.
October 04, 2025SUGAR HOUSE HEALTH CENTERHe is very professional [TRANSLATED]
October 02, 2025SUGAR HOUSE HEALTH CENTERDr Parker is an excellent doctor. Very knowledgeable and caring.
August 30, 2025SUGAR HOUSE HEALTH CENTERCaring & knowledgeable.
August 19, 2025SUGAR HOUSE HEALTH CENTERI would not recommend this dr.
June 27, 2025SUGAR HOUSE HEALTH CENTERDr Charles Parker is amazing !! He is not only very knowledgable but also very kind and personal. Very lucky to have him as my doctor.
June 27, 2025SUGAR HOUSE HEALTH CENTERClear, concise. Follow up
June 19, 2025SUGAR HOUSE HEALTH CENTERDr. Parker is kind and attentive. I've been a patient of his practice for almost 3 years. I'm grateful for their concern for me and my health.
June 18, 2025SUGAR HOUSE HEALTH CENTERI do not how to answer this question, just had a very brief meeting. He explain about the other blood test.
June 14, 2025SUGAR HOUSE HEALTH CENTERVery courteous Dr, who explained everything about my blood test certainly assured me that I was doing well and he would like to see me in a year his staff we're all very courteous
April 11, 2025SUGAR HOUSE HEALTH CENTERTough to get an appointment, but worth the wait.
March 20, 2025SUGAR HOUSE HEALTH CENTERGood professional [TRANSLATED]
February 27, 2025SUGAR HOUSE HEALTH CENTEROutstanding
November 25, 2024SUGAR HOUSE HEALTH CENTERDr. Parker is a down to earth physician. He explains things in easily understood terms. He listens to my concerns and answers clearly. He is calm and makes me at ease.
November 15, 2024SUGAR HOUSE HEALTH CENTERIt is easy to tell that Dr. Parker cares about me and all his patients.
November 01, 2024SUGAR HOUSE HEALTH CENTERHe is such a kind doctor and very thorough with all my health needs
October 17, 2024SUGAR HOUSE HEALTH CENTERDr Parker was easy to understand. He explained his thoughts in a manner I could understand.
April 11, 2024SUGAR HOUSE HEALTH CENTERAbsolutely love Dr. Parker and his PA! His concern for me and my health was absolutely amazing! The staff as a whole in his clinic are extremely friendly and helpful!
April 07, 2024SUGAR HOUSE HEALTH CENTERHe was. Amazing and the nicest bed side manner
March 26, 2024SUGAR HOUSE HEALTH CENTERVery understanding and clear with information.
March 16, 2024SUGAR HOUSE HEALTH CENTERHe is a great doctor
March 15, 2024SUGAR HOUSE HEALTH CENTERHis experience as a hematologist was very apparent. Where other doctors had said, ¿We just don't know what's wrong,¿ Dr. Parker ordered tests to see exactly what's going on with me personally. A kind, gentle doctor.
March 14, 2024SUGAR HOUSE HEALTH CENTERVery informative and knowledgeable
January 18, 2024SUGAR HOUSE HEALTH CENTERDr. Parker was very thorough in his review of my test results. I appreciate him wanting to wait and review my MRI with the radiologist when Dr. Parker noted contradictory or inconsistent interpretations. I also appreciate his description of what he was doing, keeping me informed.
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Board Certification and Academic Information
Academic Departments Internal Medicine -Professor
Academic Divisions Hematology & Hematologic Malignancies
Board Certification American Board of Internal Medicine (Internal Medicine)American Board of Internal Medicine (Internal Medicine)American Board of Internal Medicine (Sub: Hematology)American Board of Internal Medicine (Sub: Hematology)Educational Commission for Foreign Medical GraduatesLicentiate of the Medical Council of CanadaRoyal College of Physicians and Surgeons of CanadaRoyal College of Surgeons of CanadaEducation history
Fellowship Hematology/Oncology - Duke University Medical Center Fellow Residency Internal Medicine - North Carolina Memorial Hospital Resident Internship North Carolina Memorial Hospital Intern Professional Medical Medicine - University of North Carolina M.D. Undergraduate English - University of North Carolina A.B. Selected Publications
Journal Article
- Everhardt T, Julian K, Benefield R, Wilson A, Wilson N, Parker CJ, Parks A, Gilreath JA (2025). Platelet response following dexamethasone in obese vs nonobese patients with primary, acute immune-mediated thrombocytopenia. Res Pract Thromb Haemost, 9(3), 102844. (Read full publication)
- Balwani M, Bonkovsky HL, Levy C, Anderson KE, Bissell DM, Parker C, Takahashi F, Desnick RJ, Belongie K, Endeavor Investigators (2023). Dersimelagon in Erythropoietic Protoporphyrias. N Engl J Med, 388(15), 1376-1385. (Read full publication)
- Tantravahi SK, Huber BD, Vagher J, Maese L, Pomicter AD, Al-Sweel N, Asch JD, Toydemir RM, Hong B, Parker C (2022). Genome-wide uniparental disomy as a mechanism of immune escape in acquired aplastic anaemia. Br J Haematol, 198(6), e78-e81. (Read full publication)
- Ventura P, Bonkovsky HL, Gouya L, Aguilera-Peir P, Montgomery Bissell D, Stein PE, Balwani M, Anderson DKE, Parker C, Kuter DJ, Monroy S, Oh J, Ritchie B, Ko JJ, Hua Z, Sweetser MT, Sardh E, ENVISION Investigators (2021). Efficacy and safety of givosiran for acute hepatic porphyria: 24-month interim analysis of the randomized phase 3 ENVISION study. Liver Int, 42(1), 161-172. (Read full publication)
- Farrell CP, Nicolas G, Desnick RJ, Parker CJ, Lamoril J, Gouya L, Karim Z, Tchernitchko D, Chen B, Puy H, Phillips JD (2021). ABCB6 Polymorphisms are not Overly Represented in Patients with Porphyria. Blood Adv. (Read full publication)
- Abou-Ismail MY, Prchal JT, Deininger MW, Parker CJ, Lim MY (2021). Anticoagulation management post-transjugular intrahepatic portosystemic shunt in portal hypertension associated with myeloproliferative neoplasms. Blood Coagul Fibrinolysis, 32(8), 578-583. (Read full publication)
- Thiagarajan P, Parker CJ, Prchal JT (2021). How Do Red Blood Cells Die? Front Physiol, 12, 655393. (Read full publication)
- Parker CJ, Desnick RJ, Bissel MD, Bloomer JR, Singal A, Gouya L, Puy H, Anderson KE, Balwani M, Phillips JD (2019). Results of a pilot study of isoniazid in patients with erythropoietic protoporphyria. Mol Genet Metab, 128(3), 309-313. (Read full publication)
- Langendonk JG, Balwani M, Anderson KE, Bonkovsky HL, Anstey AV, Bissell DM, Bloomer J, Edwards C, Neumann NJ, Parker C, Phillips JD, Lim HW, Hamzavi I, Deybach JC, Kauppinen R, Rhodes LE, Frank J, Murphy GM, Karstens FPJ, Sijbrands EJG, de Rooij FWM, Lebwohl M, Naik H, Goding CR, Wilson JHP, Desnick RJ (2015). Afamelanotide for Erythropoietic Protoporphyria. N Engl J Med, 373(1), 48-59. (Read full publication)
- Singal AK, Parker C, Bowden C, Thapar M, Liu L, McGuire BM (2014). Liver transplantation in the management of porphyria. Hepatology, 60(3), 1082-9. (Read full publication)
- Swierczek SI, Piterkova L, Jelinek J, Agarwal N, Hammoud S, Wilson A, Hickman K, Parker CJ, Cairns BR, Prchal JT (2012). Methylation of AR locus does not always reflect X chromosome inactivation state. Blood, 119(13), e100-9. (Read full publication)
- Ahmed KB, Warner SL, Chen A, Gourley ES, Liu X, Vankayalapati H, Nussenzveig R, Prchal JT, Bearss DJ, Parker CJ (2010). In vitro and in vivo characterization of SGI-1252, a small molecule inhibitor of JAK2. Exp Hematol, 39(1), 14-25. (Read full publication)
- Parker CJ, Brodsky RA, Levine JE (2009). Treatment versus transplant for challenging hematologic disorders. Biol Blood Marrow Transplant, 15(1 Suppl), 72-8. (Read full publication)
- Parker CJ, Janatova J, Weis JH (2000). Preface. Immunopharmacology, 49(1-2), 99-100. (Read full publication)
- Bohnsack JF, Widjaja K, Ghazizadeh S, Rubens CE, Hillyard DR, Parker CJ, Albertine KH, Hill HR (1997). A role for C5 and C5a-ase in the acute neutrophil response to group B streptococcal infections. J Infect Dis, 175(4), 847-55. (Read full publication)
- Liu L, Murray DK, Dameron CT, Parker CJ, Rodgers GM (1997). Biochemical characterization of procoagulant albumin. Thromb Res, 85(5), 399-411. (Read full publication)
- Gubler DB, Ahlstrom CR, Liu L, Zhou JF, Parker CJ, Rodgers GM (1995). Procoagulant albumin increases vascular endothelial cell prostacyclin secretion. Thromb Haemost, 74(6), 1573-7. (Read full publication)
- Grosset A, Liu L, Parker CJ, Rodgers GM (1994). Bioassay of procoagulant albumin in human plasma. Thromb Res, 75(5), 551-8. (Read full publication)
- Tomita A, Radike EL, Parker CJ (1993). Isolation of erythrocyte membrane inhibitor of reactive lysis type II. Identification as glycophorin A. J Immunol, 151(6), 3308-23. (Read full publication)
- Gubler DB, Wilson BD, Parker CJ, Rodgers GM (1993). Regulation of endothelial cell protein C activation and fibrinolysis by procoagulant albumin. Thromb Res, 70(6), 459-69. (Read full publication)
- Ezzell JL, Parker CJ (1992). Cell-surface regulation of the human alternative pathway of complement. Sheep but not rabbit erythrocytes express factor I-dependent cofactor activity. Scand J Immunol, 36(1), 79-87. (Read full publication)
- Bohnsack JF, Zhou XN, Gustin JN, Rubens CE, Parker CJ, Hill HR (1992). Bacterial evasion of the antibody response: human IgG antibodies neutralize soluble but not bacteria-associated group B streptococcal C5a-ase. J Infect Dis, 165(2), 315-21. (Read full publication)
- Holguin MH, Martin CB, Bernshaw NJ, Parker CJ (1992). Analysis of the effects of activation of the alternative pathway of complement on erythrocytes with an isolated deficiency of decay accelerating factor. J Immunol, 148(2), 498-502. (Read full publication)
- Bohnsack JF, Zhou XN, Williams PA, Cleary PP, Parker CJ, Hill HR (1991). Purification of the proteinase from group B streptococci that inactivates human C5a. Biochim Biophys Acta, 1079(2), 222-8. (Read full publication)
- Janatova J, Cheung AK, Parker CJ (1991). Biomedical polymers differ in their capacity to activate complement. Complement Inflamm, 8(2), 61-9. (Read full publication)
- Lassiter HA, Speranza MJ, Hall RT, Meade V, Christensen RD, Parker CJ (1990). Complement C3 deposition onto bacteria by neonatal serum is not enhanced after the infusion of intravenous immunoglobulin. J Perinatol, 10(1), 27-31. (Read full publication)
- Parker CJ, Bernshaw NJ, Wilcox LA (1990). Analysis of the binding of human C3b to glycoproteins on rabbit and sheep erythrocytes. Complement Inflamm, 7(1), 1-17. (Read full publication)
- Cheung AK, Parker CJ, Wilcox L (1989). Effects of two types of cobra venom factor on porcine complement activation and pulmonary artery pressure. Clin Exp Immunol, 78(2), 299-306. (Read full publication)
- Lassiter HA, Christensen RD, Parker CJ (1989). Immunologic regulation of E. coli K1 by serum from neonatal rats is enhanced following intraperitoneal administration of human IgG. J Infect Dis, 159(3), 518-25. (Read full publication)
- Parker CJ, Stone OL, Bernshaw NJ (1989). Characterization of the enhanced susceptibility of paroxysmal nocturnal hemoglobinuria erythrocytes to complement-mediated hemolysis initiated by cobra venom factor. J Immunol, 142(1), 208-16. (Read full publication)
- Hill HR, Bohnsack JF, Morris EZ, Augustine NH, Parker CJ, Cleary PP, Wu JT (1988). Group B streptococci inhibit the chemotactic activity of the fifth component of complement. J Immunol, 141(10), 3551-6. (Read full publication)
- Whatley RE, Lewis MS, Zimmerman GA, McIntyre TM, Parker CJ, Stevens DL, Prescott SM (1988). The regulation of synthesis of platelet-activating factor by endothelial cells. Chest, 93(3 Suppl), 110S-111S. (Read full publication)
Review
- Adam MP, Feldman J, Mirzaa GM, Pagon RA, Wallace SE, Bean LJH, Gripp KW, Amemiya A, Barton JC, Parker CJ (1993). HFE-Related Hemochromatosis. [Review]. Gene Reviews. (Read full publication)
- Parker CJ (2012). Paroxysmal nocturnal hemoglobinuria. [Review]. Curr Opin Hematol, 19(3), 141-8. (Read full publication)
- Parker CJ (2011). Management of paroxysmal nocturnal hemoglobinuria in the era of complement inhibitory therapy. [Review]. Hematology Am Soc Hematol Educ Program, 2011, 21-9. (Read full publication)
- Parker, CJ (2011). Complement and hematology. [Review]. 8(1), 5.
Book Chapter
- Parker CJ (2017). Complement and PNH. In Kanakura Y, Kinoshita T, Nishimura J (Eds.), Paroxysmal Nocturnal Hemoglobinuria: From Bench to Bedside (pp. 67-98). Tokyo: Springer Japan KK.
- Parker CJ (2015). Paroxysmal Nocturnal Hemoglobinuria. In Kaushansky K, Lichtman M, Kipps T, Prchal J, Seligsohn U (Eds.), Williams Hematology (9th Edition). Boston: McGraw-Hill.
- Parker CJ (2015). Complement for the Clinician. In Brodsky R (Ed.), Complement-mediated Hemolytic Anemias, An Issue of Hematology/Oncology Clinics of North America. Philadelphia: Elsevier.
- Parker CJ, Ware RE (2014). Paroxysmal Nocturnal Hemoglobinuria. In Orkin S, Nathan G, Ginsburg D, Look AT, Fisher D, Lux S (Eds.), Nathan and Oski's Hematology and Oncology of Infancy and Childhood (8th Edition). Philadelphia: Elsevier.
- Parker, CJ and Ware, RE (2013). Paroxysmal nocturnal hemoglobinuria. In Greer J, Arber D, Glader B, List A, Means R, Paraskevas F, Rodgers G, Foerster J (Eds.), Wintrobe's Clinical Hematology (13th Ed, pp. 785-808). Philadelphia: Lippincott Williams & Wilkins.
Letter
- Trunk AD, Shewan SK, Lee CJ, Parker CJ, Couriel DR (2022). Chronic graft-versus-host disease exacerbation after SARS-CoV-2 vaccination. [Letter to the editor]. Bone Marrow Transplant, 57(3), 502-503. (Read full publication)