William Andrew Ankney, M.D.
Emergency Medicine Physician · Fairfield, CA
William Andrew Ankney, M.D. is an emergency medicine physician with a practice address in Fairfield, California, and NPI 1760419824, issued on Jun 26, 2006. Check the license (California A88642, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Andrew Ankney
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A88642 CA
Self-reported in NPPES; status is on the state search - Practice location
- Northbay Medical Center - Fairfield, Fairfield, CA 94533
- Phone
- (707) 429-7717
- Enumerated
- Jun 26, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20041117000851); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at Northbay Medical Center - Fairfield
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Dennis, M.D.Emergency Medicine Physician1730116799
- Toshi Hiraoka, M.D.Emergency Medicine Physician1467489427
Verify William Andrew Ankney in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A88642Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average emergency medicine physician in 2024
192 Medicare Part D claims for 135 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 48 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen26 claims
- Cephalexin22 claims
- Doxycycline Monohydrate15 claims
- Oxycodone Hcl14 claims
- Ondansetron Odt13 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
- Northbay Physicians Surgery Center, LLCFairfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Andrew Ankney among 7,751 emergency medicine physician records in California
William Andrew Ankney, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1998 · median 2011 among the 4,560 with a school on file
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Fairfield → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- David Dennis, M.D.Fairfield, CA 945331730116799
- Caesar Djavaherian, M.D.Fairfield, CA 945331790760551
- David Ehrenfeld, M.D.Fairfield, CA 945331417051830
- Steven Garcia, MDFairfield, CA 945331376868323
- Julie Hersk, M.D.Fairfield, CA 945331023114030
- Toshi Hiraoka, M.D.Fairfield, CA 945331467489427
- Gary Hollinger, PA-CFairfield, CA 945331598868705
- Kyle Holmes, M.D.Fairfeild, CA 945331386671832
Common questions
What is William Andrew Ankney, M.D.'s NPI number?
William Andrew Ankney, M.D.'s National Provider Identifier (NPI) is 1760419824, issued on Jun 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Andrew Ankney, M.D. located?
The NPPES record lists a practice address at Northbay Medical Center - Fairfield, Fairfield, CA, 94533. Phone: (707) 429-7717. Providers update this record themselves, so call before visiting.
How can I verify William Andrew Ankney, M.D.'s license?
NPPES lists California license number A88642, 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 William Andrew Ankney, M.D. prescribe under Medicare Part D?
In 2024, William Andrew Ankney, M.D. had 192 Medicare Part D claims for 135 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.