Calvin Ryan Williams
Obstetrics & Gynecology Physician · Oak Ridge, TN
Calvin Ryan Williams is an obstetrics & gynecology physician with a practice address in Oak Ridge, Tennessee, and NPI 1932664414, issued on Feb 8, 2019. Check the license (Tennessee 0000005206, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Calvin Ryan Williams
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 0000005206 TN
Self-reported in NPPES; status is on the state search - Practice location
- 988 Oak Ridge Tpke Ste 140, Oak Ridge, TN 37830
- Phone
- (865) 483-7415
- Enumerated
- Feb 8, 2019
- Record last updated
- Aug 9, 2023
- Medicare enrollment
- Enrolled (PECOS I20230810002681); accepts Medicare assignment
- Medical or professional school
- Lincoln Memorial University Medical Department, 2019
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 815 in Tennessee → Look up another NPI →
Also registered at 988 Oak Ridge Tpke Ste 140
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angela Adkisson, PAPhysician Assistant1598851602
- Regina DillObstetrics & Gynecology Physician1699020958
- Lalita Krishnan, M.D.Gynecology Physician1700975547
- Katie Robertson, DOObstetrics & Gynecology Physician1154827178
Verify Calvin Ryan Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 0000005206Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
51 Medicare Part D claims for 26 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol17 claims
- Clobetasol Propionate11 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.
Industry payments in 2024: $221.67
12 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Obstetric And Gyncologic Assocs OF Oak RidgeOak Ridge, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Calvin Ryan Williams among 815 obstetrics & gynecology physician records in Tennessee
Calvin Ryan Williams is one of 815 obstetrics & gynecology physician records with a practice address in Tennessee. 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 2019, is newer than 90% of them.
- NPI issued2019 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2019 · median 2005 among the 522 with a school on file
- Record last updated2023 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Tennessee
There are 815 obstetrics & gynecology physician records in Tennessee.
All 815 in Tennessee → Every provider in Oak Ridge → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Joseph Carter, MDOak Ridge, TN 378301427074954
- Charles Darling, MDOak Ridge, TN 378301609809797
- Regina DillOak Ridge, TN 378301699020958
- Kathryn Hayes, MDOak Ridge, TN 378301154548105
- Thomas Metcalf, M.D.Oak Ridge, TN 378301669561023
- Scott Peters, MDOak Ridge, TN 378301134218811
- Katie Robertson, DOOak Ridge, TN 378301154827178
- Andwylynn Sances, M.D.Oak Ridge, TN 378301912095357
Common questions
What is Calvin Ryan Williams's NPI number?
Calvin Ryan Williams's National Provider Identifier (NPI) is 1932664414, issued on Feb 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Calvin Ryan Williams located?
The NPPES record lists a practice address at 988 Oak Ridge Tpke Ste 140, Oak Ridge, TN, 37830. Phone: (865) 483-7415. Providers update this record themselves, so call before visiting.
How can I verify Calvin Ryan Williams's license?
NPPES lists Tennessee license number 0000005206, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Calvin Ryan Williams prescribe under Medicare Part D?
In 2024, Calvin Ryan Williams had 51 Medicare Part D claims for 26 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.