Irina V. Williams, M.D.
Pain Medicine (Anesthesiology) Physician · Oakland, CA
Irina V. Williams, M.D. is a pain medicine (anesthesiology) physician with a practice address in Oakland, California, and NPI 1508187600, issued on Jun 13, 2010. Check the license (California A130826, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Irina V. Williams
- Credential
- M.D.
- Primary taxonomy
- Pain Medicine (Anesthesiology) Physician 207LP2900X
- License number
- A130826 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1411 E 31St St, Oakland, CA 94602
- Phone
- (510) 437-4800
- Enumerated
- Jun 13, 2010
- Record last updated
- Oct 1, 2024
- Medicare enrollment
- Enrolled (PECOS I20260325001111); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pain medicine (anesthesiology) physician records → All 536 in California → Look up another NPI →
Also registered at 1411 E 31St St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Irina V. Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A130826Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average pain medicine (anesthesiology) physician in 2024
214 Medicare Part D claims for 43 beneficiaries, against an average of 1,750 among the 2,982 providers of this specialty who prescribed in Part D. 56 claims were for opioids.
Most prescribed
- Gabapentin47 claims
- Oxycodone-Acetaminophen21 claims
- Pregabalin20 claims
- Duloxetine Hcl19 claims
- Hydrocodone-Acetaminophen19 claims
- Buprenorphine Hcl15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $89.75
3 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 2,789 providers of this specialty with any payment received $3,225.41 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 3 group practices
- Lin Health Medical Group OF California PCDenver, CO
- Lin Health Medical Group PADenver, CO
- Permanente Medical Group IncRedwood City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Irina V. Williams among 536 pain medicine (anesthesiology) physician records in California
Irina V. Williams, M.D. is one of 536 pain medicine (anesthesiology) physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 66% of them.
- NPI issued2010 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2008 · median 2004 among the 367 with a school on file
- Record last updated2024 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP2900X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pain Medicine (Anesthesiology) Physician providers in California
There are 536 pain medicine (anesthesiology) physician records in California.
All 536 in California → Every provider in Oakland → Pain Medicine (Anesthesiology) Physician nationwide →
The 8 pain medicine (anesthesiology) physician records with the nearest ZIP codes
- Krishna Kudaravalli, MDOakland, CA 946021801470596
- James Mura, MDWalnut Creek, CA 945981881863215
- Tracy Jackson, MDWalnut Creek, CA 945971154436590
- Neil Kamdar, M.D.Emeryville, CA 946081093000226
- Timothy Lo, M.D., M.P.H.Emeryville, CA 946081194851857
- Alexander Pekurovsky, MDWalnut Creek, CA 945961386930600
- Andrew Vargas, MDEmeryville, CA 946081932594793
- Henry Wu, M.D., PH.D.Walnut Creek, CA 945961093179004
Common questions
What is Irina V. Williams, M.D.'s NPI number?
Irina V. Williams, M.D.'s National Provider Identifier (NPI) is 1508187600, issued on Jun 13, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Irina V. Williams, M.D. located?
The NPPES record lists a practice address at 1411 E 31St St, Oakland, CA, 94602. Phone: (510) 437-4800. Providers update this record themselves, so call before visiting.
How can I verify Irina V. Williams, M.D.'s license?
NPPES lists California license number A130826, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Irina V. Williams, M.D. prescribe under Medicare Part D?
In 2024, Irina V. Williams, M.D. had 214 Medicare Part D claims for 43 beneficiaries; the average among pain medicine (anesthesiology) physician prescribers was 1,750. Part D covers Medicare prescriptions only.
What is Irina V. Williams, M.D.'s MIPS final score?
The 2023 MIPS final score is 91 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.