Kristin Ayer, CNM
Obstetrics & Gynecology Physician · Santa Cruz, CA
Kristin Ayer, CNM is an obstetrics & gynecology physician with a practice address in Santa Cruz, California, and NPI 1265402093, issued on Jan 24, 2006. Check the license (California NM994, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kristin Ayer
- Credential
- CNM
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- NM994 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2907 Chanticleer Avenue, Santa Cruz, CA 95065
- Phone
- (831) 477-2375
- Enumerated
- Jan 24, 2006
- Record last updated
- Dec 8, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090512000514); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 2907 Chanticleer Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jillene Costa, DPMPodiatrist1033378468
- Scott Merlo, PAPhysician Assistant1952479644
- Timmi Pereira, CNMAdvanced Practice Midwife1992775399
Verify Kristin Ayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license NM994Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
70% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
49 Medicare Part D claims for 19 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol17 claims
- Progesterone12 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
- Sutter Bay Medical FoundationSanta Cruz, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristin Ayer among 5,088 obstetrics & gynecology physician records in California
Kristin Ayer, CNM is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1993 · median 2004 among the 2,700 with a school on file
- Record last updated2011 · 64% 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 California 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 California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Santa Cruz → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Kelli Beingesser, MDSanta Cruz, CA 950651730144528
- Adwoa Christy, MDSanta Cruz, CA 950651225017379
- Janna Doherty, M.D.Santa Cruz, CA 950651790898823
- Angela Lawson, MDSanta Cruz, CA 950651386624989
- Kimberly Moreland, MDSanta Cruz, CA 950651871572008
- Nilda Moreno-Ruiz, MDSanta Cruz, CA 950651619950953
- Marsha Muir, M.D.Santa Cruz, CA 950651740396365
- Stuart Mumm, MDSanta Cruz, CA 950651033287131
Common questions
What is Kristin Ayer, CNM's NPI number?
Kristin Ayer, CNM's National Provider Identifier (NPI) is 1265402093, issued on Jan 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kristin Ayer, CNM located?
The NPPES record lists a practice address at 2907 Chanticleer Avenue, Santa Cruz, CA, 95065. Phone: (831) 477-2375. Providers update this record themselves, so call before visiting.
How can I verify Kristin Ayer, CNM's license?
NPPES lists California license number NM994, 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 Kristin Ayer, CNM prescribe under Medicare Part D?
In 2024, Kristin Ayer, CNM had 49 Medicare Part D claims for 19 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.