Douglass Alan Drelich, M.D.
Hematology (Internal Medicine) Physician · Philadelphia, PA
Douglass Alan Drelich, M.D. is a hematology (internal medicine) physician with a practice address in Philadelphia, Pennsylvania, and NPI 1932394095, issued on Sep 12, 2007. Check the license (Pennsylvania MD438059, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Douglass Alan Drelich
- Credential
- M.D.
- Primary taxonomy
- Hematology (Internal Medicine) Physician 207RH0000X
- License number
- MD438059 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1015 Chestnut Street, Philadelphia, PA 19107
- Phone
- (215) 955-4730
- Enumerated
- Sep 12, 2007
- Record last updated
- Dec 17, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (215) 503-9188
- Medicaid IDs
- 102343024 PA
0205141 NJ - Medicare enrollment
- Enrolled (PECOS I20090909000036); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology (internal medicine) physician records → All 67 in Pennsylvania → Look up another NPI →
Also registered at 1015 Chestnut Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul BrayHematology (Internal Medicine) Physician1144333097
- Jaime Caro, M.D.Hematology (Internal Medicine) Physician1295759413
- Steven McKenzie, M.D.Medical Oncology Physician1568476729
- Sanaa Rizk, MDHematology (Internal Medicine) Physician1437394210
- Marc Schwartz, MDCardiovascular Disease Physician1700997079
- John Zurlo, MDInfectious Disease Physician1003865312
Verify Douglass Alan Drelich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD438059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average hematology (internal medicine) physician in 2024
50 Medicare Part D claims for 13 beneficiaries, against an average of 496 among the 1,036 providers of this specialty who prescribed in Part D.
Most prescribed
- Warfarin Sodium20 claims
- Celecoxib11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Jefferson University PhysiciansPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglass Alan Drelich among 67 hematology (internal medicine) physician records in Pennsylvania
Douglass Alan Drelich, M.D. is one of 67 hematology (internal medicine) physician records with a practice address in Pennsylvania. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 42% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2003 · median 2001 among the 44 with a school on file
- Record last updated2014 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology (Internal Medicine) Physician providers in Pennsylvania
There are 67 hematology (internal medicine) physician records in Pennsylvania.
All 67 in Pennsylvania → Every provider in Philadelphia → Hematology (Internal Medicine) Physician nationwide →
The 8 hematology (internal medicine) physician records with the nearest ZIP codes
- Srikala Addepalli, M.D.Philadelphia, PA 191071457630915
- Paul BrayPhiladelphia, PA 191071144333097
- Jaime Caro, M.D.Philadelphia, PA 191071295759413
- Scott Dessain, M.D.Philadelphia, PA 191071326061508
- Elizabeth Pulte, MDPhiladelphia, PA 191071417040528
- Sanaa Rizk, MDPhiladelphia, PA 191071437394210
- Ingrid Kohut, DOPhiladelphia, PA 191061225094212
- Jane Alavi, MDPhiladelphia, PA 191041285662387
Common questions
What is Douglass Alan Drelich, M.D.'s NPI number?
Douglass Alan Drelich, M.D.'s National Provider Identifier (NPI) is 1932394095, issued on Sep 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Douglass Alan Drelich, M.D. located?
The NPPES record lists a practice address at 1015 Chestnut Street, Philadelphia, PA, 19107. Phone: (215) 955-4730. Providers update this record themselves, so call before visiting.
How can I verify Douglass Alan Drelich, M.D.'s license?
NPPES lists Pennsylvania license number MD438059, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Douglass Alan Drelich, M.D. prescribe under Medicare Part D?
In 2024, Douglass Alan Drelich, M.D. had 50 Medicare Part D claims for 13 beneficiaries; the average among hematology (internal medicine) physician prescribers was 496. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.