Mari Anne Madsen, M.D.
Colon & Rectal Surgery Physician · West Hollywood, CA
Mari Anne Madsen, M.D. is a colon & rectal surgery physician with a practice address in West Hollywood, California, and NPI 1942286638, issued on Dec 15, 2005. Check the license (California A92144, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mari Anne Madsen
- Credential
- M.D.
- Primary taxonomy
- Colon & Rectal Surgery Physician 208C00000X
- License number
- A92144 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8737 Beverly Blvd, West Hollywood, CA 90048
- Phone
- (310) 854-3580
- Enumerated
- Dec 15, 2005
- Record last updated
- Apr 23, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (310) 659-5830
- Medicaid ID
- 00A92144 CA
- Medicare enrollment
- Enrolled (PECOS I20150323001043); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest colon & rectal surgery physician records → All 198 in California → Look up another NPI →
Also registered at 8737 Beverly Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Siamak Bagheri, PHARM.D.Pharmacist1114095643
- Paula Bernstein, MDObstetrics & Gynecology Physician1891788501
- Pamela Fenton, M.DSpecialist1134130990
- Michelle Gabbai, MDSpecialist1659437358
- Ramin Gabbai, MDNephrology Physician1457417248
- Alex Kawana, M.DSpecialist1316951171
Verify Mari Anne Madsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A92144Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average colon & rectal surgery physician in 2024
117 Medicare Part D claims for 59 beneficiaries, against an average of 192 among the 1,836 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 16 claims were for opioids.
Most prescribed
- Neomycin Sulfate30 claims
- Metronidazole29 claims
- Gabapentin16 claims
- Oxycodone Hcl13 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
- Annapolis Colon And Rectal Surgeons LLCAnnapolis, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mari Anne Madsen among 198 colon & rectal surgery physician records in California
Mari Anne Madsen, M.D. is one of 198 colon & rectal surgery physician records with a practice address in California. 87% 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, 90% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated1999 · median 2002 among the 149 with a school on file
- Record last updated2012 · 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 208C00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Colon & Rectal Surgery Physician providers in California
There are 198 colon & rectal surgery physician records in California.
All 198 in California → Every provider in West Hollywood → Colon & Rectal Surgery Physician nationwide →
The 8 colon & rectal surgery physician records with the nearest ZIP codes
- Phillip Fleshner, MDLos Angeles, CA 900481881695286
- Beth Moore, M.D.West Hollywood, CA 900481720139488
- Alessio Pigazzi, M.D.Los Angeles, CA 900481205935913
- David Rosenfeld, MDLos Angeles, CA 900481831105873
- Thomas Sokol, MDWest Hollywood, CA 900481952452799
- Adam Truong, MDWest Hollywood, CA 900481376032342
- Lucille Yao, MDWest Hollywood, CA 900481982190088
- Adil Farooqui, MDLos Angeles, CA 900341417016163
Common questions
What is Mari Anne Madsen, M.D.'s NPI number?
Mari Anne Madsen, M.D.'s National Provider Identifier (NPI) is 1942286638, issued on Dec 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mari Anne Madsen, M.D. located?
The NPPES record lists a practice address at 8737 Beverly Blvd, West Hollywood, CA, 90048. Phone: (310) 854-3580. Providers update this record themselves, so call before visiting.
How can I verify Mari Anne Madsen, M.D.'s license?
NPPES lists California license number A92144, 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 Mari Anne Madsen, M.D. prescribe under Medicare Part D?
In 2024, Mari Anne Madsen, M.D. had 117 Medicare Part D claims for 59 beneficiaries; the average among colon & rectal surgery physician prescribers was 192. 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.