Darren Mast, DO
Psychiatry Physician · Philadelphia, PA
Darren Mast, DO is a psychiatry physician with a practice address in Philadelphia, Pennsylvania, and NPI 1548944853, issued on Jun 15, 2023. Check the license (Pennsylvania OT022681, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Darren Mast
- Credential
- DO
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- OT022681 PA
Self-reported in NPPES; status is on the state search - Practice location
- 5501 Old York RD Ste 1, Philadelphia, PA 19141
- Phone
- (215) 456-9850
- Enumerated
- Jun 15, 2023
- Record last updated
- Jun 16, 2023
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,662 in Pennsylvania → Look up another NPI →
Also registered at 5501 Old York RD Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shakelah Ahmady, CRNPPediatric Nurse Practitioner1669139887
- Eman Ahmed, DOStudent in an Organized Health Care Education/Training Program1194518340
- Elise Ahn, MDStudent in an Organized Health Care Education/Training Program1639009095
Verify Darren Mast in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OT022681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
87% fewer Medicare Part D claims than the average psychiatry physician in 2024
133 Medicare Part D claims for 20 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Gabapentin13 claims
- Pantoprazole Sodium13 claims
- Diclofenac Sodium12 claims
- Hydroxyzine Hcl11 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.
Darren Mast among 2,662 psychiatry physician records in Pennsylvania
Darren Mast, DO is one of 2,662 psychiatry physician records with a practice address in Pennsylvania. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 94% of them.
- NPI issued2023 · 94% of these records are older, 4% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileNo · 45% of these records are
- Record last updated2023 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
727 psychiatry physician records list a practice address in Philadelphia
They are 727 of the 42,849 NPPES records with a practice address in Philadelphia, and 2,662 psychiatry physician records in Pennsylvania.
All 2,662 in Pennsylvania → Every provider in Philadelphia → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Norma Cruz Luna, M.D.Philadelphia, PA 191411992909733
- Abayomi Ige, M.D.Philadelphia, PA 191411184620130
- Ashika Kapoor, MDPhila, PA 191411003841503
- Mahrukh Khan, M.D.Philadelphia, PA 191411467426247
- Ajita Mathur, M.DPhiladelphia, PA 191411669416657
- Angela McCarthy, DOPhiladelphia, PA 191411558574509
- Sarah Noble, D.O.Philadelphia, PA 191411366646101
- Conrada Ola, M.D.Philadelphia, PA 191411790711547
Common questions
What is Darren Mast, DO's NPI number?
Darren Mast, DO's National Provider Identifier (NPI) is 1548944853, issued on Jun 15, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Darren Mast, DO located?
The NPPES record lists a practice address at 5501 Old York RD Ste 1, Philadelphia, PA, 19141. Phone: (215) 456-9850. Providers update this record themselves, so call before visiting.
How can I verify Darren Mast, DO's license?
NPPES lists Pennsylvania license number OT022681, 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 Darren Mast, DO prescribe under Medicare Part D?
In 2024, Darren Mast, DO had 133 Medicare Part D claims for 20 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.