Mary Haynes, F.N.P.
Family Nurse Practitioner · Lancaster, CA
Mary Haynes, F.N.P. is a family nurse practitioner with a practice address in Lancaster, California, and NPI 1902896921, issued on Oct 21, 2005. Check the license (California NP12899, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Haynes
- Credential
- F.N.P.
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- NP12899 CA
Self-reported in NPPES; status is on the state search - Practice location
- 45104 10TH St W, Lancaster, CA 93534
- Phone
- (661) 942-2391
- Enumerated
- Oct 21, 2005
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 45104 10TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Oluwamuyiwa Bolonduro, M.DObstetrics & Gynecology Physician1215216965
- Jacob Carpenter, FNP-CFamily Nurse Practitioner1295199263
- Suttirak ChaiwongkarjohnSpecialist1083879084
- Kyriacos Charalambides, M.D.Geriatric Medicine (Internal Medicine) Physician1255589420
Verify Mary Haynes in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NP12899Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average family nurse practitioner in 2024
683 Medicare Part D claims for 282 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Lisinopril207 claims
- Amlodipine Besylate181 claims
- Losartan Potassium115 claims
- Hydrochlorothiazide85 claims
- Hydralazine Hcl32 claims
- Bisoprolol Fumarate22 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.
Mary Haynes among 16,966 family nurse practitioner records in California
Mary Haynes, F.N.P. is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 99% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
89 family nurse practitioner records list a practice address in Lancaster
They are 89 of the 4,273 NPPES records with a practice address in Lancaster, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Lancaster → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Sandra Callaghan, FNPLancaster, CA 935341780970517
- Jacob Carpenter, FNP-CLancaster, CA 935341295199263
- Sukhvir Dhinsa, FNP-BCLancaster, CA 935341255707493
- Richard Emanuel, FNPLancaster, CA 935341922399609
- Pascualita FloresLancaster, CA 935341386040145
- Meredith Graham, NPLancaster, CA 935341558634337
- Dorothy Griego, FNPCLancaster, CA 935341992977326
- Carlos Guerrero, FNPLancaster, CA 935341699855080
Common questions
What is Mary Haynes, F.N.P.'s NPI number?
Mary Haynes, F.N.P.'s National Provider Identifier (NPI) is 1902896921, issued on Oct 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mary Haynes, F.N.P. located?
The NPPES record lists a practice address at 45104 10TH St W, Lancaster, CA, 93534. Phone: (661) 942-2391. Providers update this record themselves, so call before visiting.
How can I verify Mary Haynes, F.N.P.'s license?
NPPES lists California license number NP12899, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Haynes, F.N.P. prescribe under Medicare Part D?
In 2024, Mary Haynes, F.N.P. had 683 Medicare Part D claims for 282 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.