Mary Ann Bos, DO
Orthopaedic Hand Surgery Physician · Downey, CA
Mary Ann Bos, DO is an orthopaedic hand surgery physician with a practice address in Downey, California, and NPI 1780768879, issued on Oct 25, 2006. Check the license (California 20A7009, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Ann Bos
- Credential
- DO
- Primary taxonomy
- Orthopaedic Hand Surgery Physician 207XS0106X
- License number
- 20A7009 CA
Self-reported in NPPES; status is on the state search - Practice location
- 8555 E Florence Ave, Downey, CA 90240
- Phone
- (562) 923-9351
- Enumerated
- Oct 25, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (562) 869-6294
- Medicare enrollment
- Enrolled (PECOS I20211214001793); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1991
- Entity
- Type 1 · individual
8 nearest orthopaedic hand surgery physician records → All 288 in California → Look up another NPI →
Also registered at 8555 E Florence Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Frank Giacobetti, MDOrthopaedic Surgery Physician1033293121
Verify Mary Ann Bos in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A7009Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average orthopaedic hand surgery physician in 2024
35 Medicare Part D claims for 13 beneficiaries, against an average of 186 among the 2,203 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Cephalexin13 claims
- Ibuprofen13 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: $141.73
3 payments; by number, the most common kind was food and beverage; the largest payer was Stryker Corporation. The 1,819 providers of this specialty with any payment received $5,529.86 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
- Beach Cities Orthopedics And Sports MedicineManhattan Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Ann Bos among 288 orthopaedic hand surgery physician records in California
Mary Ann Bos, DO is one of 288 orthopaedic hand surgery physician records with a practice address in California. 85% 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 11% of them.
- NPI issued2006 · 11% of these records are older, 52% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1991 · median 2004 among the 214 with a school on file
- Record last updated2007 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0106X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Hand Surgery Physician providers in California
There are 288 orthopaedic hand surgery physician records in California.
All 288 in California → Every provider in Downey → Orthopaedic Hand Surgery Physician nationwide →
The 8 orthopaedic hand surgery physician records with the nearest ZIP codes
- Roy Caputo, M.D.Downey, CA 902401003886029
- Andre Chaves, M.D.Downey, CA 902401659341766
- Danny Harrison, M.D.Downey, CA 902401184763435
- Lis Stark, M.D.Downey, CA 902401306816418
- Richard Rogachefsky, M.D.Lawndale, CA 902601316981954
- Anthony Ahn, M.D.Manhattan Beach, CA 902661649282302
- Edwin Ashley, M.D.Beverly Hills, CA 902111417920919
- Steven Brourman, M.D.Beverly Hills, CA 902111891768396
Common questions
What is Mary Ann Bos, DO's NPI number?
Mary Ann Bos, DO's National Provider Identifier (NPI) is 1780768879, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Ann Bos, DO located?
The NPPES record lists a practice address at 8555 E Florence Ave, Downey, CA, 90240. Phone: (562) 923-9351. Providers update this record themselves, so call before visiting.
How can I verify Mary Ann Bos, DO's license?
NPPES lists California license number 20A7009, 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 Ann Bos, DO prescribe under Medicare Part D?
In 2024, Mary Ann Bos, DO had 35 Medicare Part D claims for 13 beneficiaries; the average among orthopaedic hand surgery physician prescribers was 186. 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.