Marvin Posner, M.D.
Neonatal-Perinatal Medicine Physician · Mission Viejo, CA
Marvin Posner, M.D. is a neonatal-perinatal medicine physician with a practice address in Mission Viejo, California, and NPI 1285734095, issued on Sep 22, 2006. Check the license (California A44198, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Marvin Posner
- Credential
- M.D.
- Primary taxonomy
- Neonatal-Perinatal Medicine Physician 2080N0001X
- License number
- A44198 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27800 Medical Center RD, Mission Viejo, CA 92691
- Phone
- (949) 364-1400
- Enumerated
- Sep 22, 2006
- Record last updated
- Mar 31, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicaid ID
- 00A441980 CA
- Entity
- Type 1 · individual
8 nearest neonatal-perinatal medicine physician records → All 871 in California → Look up another NPI →
Also registered at 27800 Medical Center RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- William Berger, M.D.Allergy Physician1538260583
- Lisa Bretches, N.P.Pediatric Nurse Practitioner1477890242
- Andrew ChangPediatric Dentistry1083992994
- Sabrina Cooley, MDFamily Medicine Physician1629272588
- Atria DehmoobadClinical Social Worker1922966340
- Kimberly Douglas, MDPediatrics Physician1619017670
Verify Marvin Posner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A44198Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
67% fewer Medicare Part D claims than the average neonatal-perinatal medicine physician in 2024
11 Medicare Part D claims, against an average of 33 among the 189 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Marvin Posner among 871 neonatal-perinatal medicine physician records in California
Marvin Posner, M.D. is one of 871 neonatal-perinatal medicine physician records with a practice address in California. 15% 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 3% of them.
- NPI issued2006 · 3% of these records are older, 52% newer
- In a Medicare fileYes · 15% of these records are
- In the CMS Doctors and Clinicians fileNo · 7% of these records are
- Record last updated2009 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2080N0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neonatal-Perinatal Medicine Physician providers in California
There are 871 neonatal-perinatal medicine physician records in California.
All 871 in California → Every provider in Mission Viejo → Neonatal-Perinatal Medicine Physician nationwide →
The 8 neonatal-perinatal medicine physician records with the nearest ZIP codes
- Vivien Pan, M.D.Mission Viejo, CA 926911902903164
- John Miller, M.D.Ladera Ranch, CA 926941174586317
- Roberta Bruni Barnett, MDFountain Valley, CA 927081609841899
- Glenn Ginoza, MDFountain Valley, CA 927081568425288
- Susan Sobczak-Hoeft, D.O.Fountain Valley, CA 927081275645772
- Marlene Tan, M.D.Newport Beach, CA 926581073556296
- Albert Antonio, D.O.Laguna Hills, CA 926531689094518
- Lily Chen, M.D.Laguna Hills, CA 926531861455024
Common questions
What is Marvin Posner, M.D.'s NPI number?
Marvin Posner, M.D.'s National Provider Identifier (NPI) is 1285734095, issued on Sep 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marvin Posner, M.D. located?
The NPPES record lists a practice address at 27800 Medical Center RD, Mission Viejo, CA, 92691. Phone: (949) 364-1400. Providers update this record themselves, so call before visiting.
How can I verify Marvin Posner, M.D.'s license?
NPPES lists California license number A44198, 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 Marvin Posner, M.D. prescribe under Medicare Part D?
In 2024, Marvin Posner, M.D. had 11 Medicare Part D claims; the average among neonatal-perinatal medicine physician prescribers was 33. 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.