Mary Newkirk, M.D.
Family Medicine Physician · Saint Helena, CA
Mary Newkirk, M.D. is a family medicine physician with a practice address in Saint Helena, California, and NPI 1124088323, issued on Mar 23, 2006. Check the license (California A37632, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Newkirk
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A37632 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10 Woodland RD, Saint Helena, CA 94574
- Phone
- (707) 963-6399
- Enumerated
- Mar 23, 2006
- Record last updated
- Dec 1, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (707) 967-5915
- Medicare enrollment
- Enrolled (PECOS I20091216000619); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1980
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 10 Woodland RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Wendy Battistini, PTPhysical Therapist1215888276
- Julie Butulia, RDRegistered Dietitian1679376891
- Danny Cao, PHARMACISTPharmacist1447069570
- David Carelock, CRNACertified Registered Nurse Anesthetist1790773596
Verify Mary Newkirk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A37632Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average family medicine physician in 2024
140 Medicare Part D claims for 57 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims.
Most prescribed
- Cefdinir15 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: $30.10
1 payment: food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Quantum Healthcare Medical Associates IncHilo, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Newkirk among 17,133 family medicine physician records in California
Mary Newkirk, M.D. is one of 17,133 family 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 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1980 · median 2005 among the 10,652 with a school on file
- Record last updated2017 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 family medicine physician records list a practice address in Saint Helena
They are 8 of the 232 NPPES records with a practice address in Saint Helena, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Saint Helena → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Barry Brown, M.D.Saint Helena, CA 945741346387412
- Cheryl Chong, D.O.Saint Helena, CA 945741629368774
- Timothy Dowling, DOSaint Helena, CA 945741215946355
- Marie HughesSaint Helena, CA 945741508273095
- Gary Mishkin, M.D.Saint Helena, CA 945741912981382
- Daniel Weinberg, MDSaint Helena, CA 945741740610500
- Jonathan Wheeler, MDSaint Helena, CA 945741013919752
- Neha Ansari, MDSan Leandro, CA 945771669009874
Common questions
What is Mary Newkirk, M.D.'s NPI number?
Mary Newkirk, M.D.'s National Provider Identifier (NPI) is 1124088323, issued on Mar 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Newkirk, M.D. located?
The NPPES record lists a practice address at 10 Woodland RD, Saint Helena, CA, 94574. Phone: (707) 963-6399. Providers update this record themselves, so call before visiting.
How can I verify Mary Newkirk, M.D.'s license?
NPPES lists California license number A37632, 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 Mary Newkirk, M.D. prescribe under Medicare Part D?
In 2024, Mary Newkirk, M.D. had 140 Medicare Part D claims for 57 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.