William Black McMillan, M.D.
Internal Medicine Physician · Norman, OK
William Black McMillan, M.D. is an internal medicine physician with a practice address in Norman, Oklahoma, and NPI 1770516825, issued on Jul 9, 2006. Check the license on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- William Black McMillan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD035193L PA
Self-reported in NPPES; status is on the state search - Practice location
- 901 N Porter Ave, Norman, OK 73071
- Phone
- (412) 308-6456
- Enumerated
- Jul 9, 2006
- Record last updated
- Apr 26, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,115 in Oklahoma → Look up another NPI →
Also registered at 901 N Porter Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Black McMillan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and SupervisionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
36 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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.
William Black McMillan among 1,115 internal medicine physician records in Oklahoma
William Black McMillan, M.D. is one of 1,115 internal medicine physician records with a practice address in Oklahoma. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 57% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2012 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Oklahoma
There are 1,115 internal medicine physician records in Oklahoma.
All 1,115 in Oklahoma → Every provider in Norman → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lydia Ballard, M.D.Norman, OK 730711760483457
- Jonathan Bryan, D.O.Norman, OK 730711437363702
- Geo Philips Chacko, MDNorman, OK 730711700842440
- Kumar Ennamuri, MDNorman, OK 730711396783056
- John Krodel, M.D.Norman, OK 730711225020035
- John McCarter, M DNorman, OK 730711568445625
- Thomas Merrill, M.D.Norman, OK 730711760474605
- Serena Mitroo, MDNorman, OK 730711780880252
Common questions
What is William Black McMillan, M.D.'s NPI number?
William Black McMillan, M.D.'s National Provider Identifier (NPI) is 1770516825, issued on Jul 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Black McMillan, M.D. located?
The NPPES record lists a practice address at 901 N Porter Ave, Norman, OK, 73071. Phone: (412) 308-6456. Providers update this record themselves, so call before visiting.
How can I verify William Black McMillan, M.D.'s license?
Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Black McMillan, M.D. prescribe under Medicare Part D?
In 2024, William Black McMillan, M.D. had 36 Medicare Part D claims; the average among internal medicine physician prescribers was 3,176. 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.