Josiah An, M.D.
Hematology & Oncology Physician · Winston Salem, NC
Josiah An, M.D. is a hematology & oncology physician with a practice address in Winston Salem, North Carolina, and NPI 1053791517, issued on May 31, 2015. Check the license (North Carolina 2021-01298, as entered in NPPES) on the North Carolina Medical Board; the Medicare figures below come from public CMS files.
- Name
- Josiah An
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License numbers
- 2021-01298 NC
R10218 IA
MD70049970 WA
Self-reported in NPPES; status is on the state search - Practice location
- 3333 Silas Creek Pkwy, Winston Salem, NC 27103
- Phone
- (336) 277-8800
- Enumerated
- May 31, 2015
- Record last updated
- Dec 17, 2025
- Fax
- (336) 277-8850
- Medicare enrollment
- Enrolled (PECOS I20240402001541); accepts Medicare assignment
- Medical or professional school
- Southern Illinois University School Of Medicine, 2015
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 431 in North Carolina → Look up another NPI →
Also registered at 3333 Silas Creek Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Indrani Acosta, M.D.Neurology Physician1962699892
- Quentin Adams, M.D.Radiation Oncology Physician1679923270
- Richard Adams, LPCMental Health Counselor1871868315
- Emily Addington, FNP-CNurse Practitioner1174251193
- Victor Adkisson, MDInternal Medicine Physician1912058553
Verify Josiah An in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNorth Carolina Medical Board
Search for license 2021-01298Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
698 Medicare Part D claims for 187 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 22 claims were for opioids.
Most prescribed
- Prednisone57 claims
- Anastrozole54 claims
- Abiraterone Acetate51 claims
- Ondansetron Hcl48 claims
- Lenalidomide37 claims
- Dexamethasone36 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
- Southern California Permanente Medical GroupBellflower, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Josiah An among 431 hematology & oncology physician records in North Carolina
Josiah An, M.D. is one of 431 hematology & oncology physician records with a practice address in North Carolina. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 83% of them.
- NPI issued2015 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2015 · median 2003 among the 302 with a school on file
- Record last updated2025 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a North Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in North Carolina
There are 431 hematology & oncology physician records in North Carolina.
All 431 in North Carolina → Every provider in Winston Salem → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Elms Allen, MDWinston Salem, NC 271031699837211
- Cristina Olivo Freites, MDWinston Salem, NC 271031699380873
- Nathan Streer, M.D.Winston Salem, NC 271031972790921
- Hugh Wallace, MDWinston Salem, NC 271031487624581
- Heidi Klepin, MDWinston Salem, NC 271571275551228
- Susan Melin, MDWinston Salem, NC 271571528042058
- Antonius Miller, MDWinston Salem, NC 271571790769222
- Boris Pasche, MDWinston Salem, NC 271571154352615
Common questions
What is Josiah An, M.D.'s NPI number?
Josiah An, M.D.'s National Provider Identifier (NPI) is 1053791517, issued on May 31, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Josiah An, M.D. located?
The NPPES record lists a practice address at 3333 Silas Creek Pkwy, Winston Salem, NC, 27103. Phone: (336) 277-8800. Providers update this record themselves, so call before visiting.
How can I verify Josiah An, M.D.'s license?
NPPES lists North Carolina license number 2021-01298, as entered by the provider. Search the North Carolina Medical Board at https://portal.ncmedboard.org/verification/search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Josiah An, M.D. prescribe under Medicare Part D?
In 2024, Josiah An, M.D. had 698 Medicare Part D claims for 187 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.