Michael Krosin, MD
Orthopaedic Surgery Physician · Castro Valley, CA
Michael Krosin, MD is an orthopaedic surgery physician with a practice address in Castro Valley, California, and NPI 1578705000, issued on Mar 30, 2009. Check the license (California A96292, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Krosin
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License numbers
- A96292 CA
01066586A IN
Self-reported in NPPES; status is on the state search - Practice location
- 19845 Lake Chabot RD Ste 200, Castro Valley, CA 94546
- Phone
- (510) 750-1967
- Enumerated
- Mar 30, 2009
- Record last updated
- May 7, 2026
- Fax
- (844) 718-0067
- Medicare enrollment
- Enrolled (PECOS I20091204000026); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 2004
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 2,276 in California → Look up another NPI →
Also registered at 19845 Lake Chabot RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Lesher, MDSurgery Physician1689963118
- William Wood, M.D., M.S.Surgery Physician1821309022
Verify Michael Krosin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A96292Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
187 Medicare Part D claims for 64 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. 77 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen38 claims
- Diclofenac Sodium34 claims
- Oxycodone-Acetaminophen31 claims
- Ondansetron Hcl17 claims
- Hydroxyzine Hcl13 claims
- Sulfamethoxazole-Trimethoprim12 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,263.27
20 payments; by number, the most common kind was food and beverage; the largest payer was Paragon 28, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 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 3 group practices
- Alameda Health SystemOakland, CA
- Bass Medical GroupAlamo, CA
- Sutter Bay Medical FoundationCastro Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Krosin among 2,276 orthopaedic surgery physician records in California
Michael Krosin, MD is one of 2,276 orthopaedic surgery 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 2009, is newer than 69% of them.
- NPI issued2009 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2004 · median 2003 among the 1,347 with a school on file
- Record last updated2026 · 66% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in California
There are 2,276 orthopaedic surgery physician records in California.
All 2,276 in California → Every provider in Castro Valley → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Douglas Abeles, MDCastro Valley, CA 945461508961582
- Robert Forster, M.D.Castro Valley, CA 945461003883356
- Michael Krinsky, M.D.Castro Valley, CA 945461194757716
- Robert Martin, M.D.Castro Valley, CA 945461356318794
- Martha Singer, M.D.Castro Valley, CA 945461275501330
- Norman Cheung, MDHayward, CA 945451407879984
- Sami Dughman, MDHayward, CA 945451679651434
- Pearl Hu, MDHayward, CA 945451922186774
Common questions
What is Michael Krosin, MD's NPI number?
Michael Krosin, MD's National Provider Identifier (NPI) is 1578705000, issued on Mar 30, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Michael Krosin, MD located?
The NPPES record lists a practice address at 19845 Lake Chabot RD Ste 200, Castro Valley, CA, 94546. Phone: (510) 750-1967. Providers update this record themselves, so call before visiting.
How can I verify Michael Krosin, MD's license?
NPPES lists California license number A96292, 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 Michael Krosin, MD prescribe under Medicare Part D?
In 2024, Michael Krosin, MD had 187 Medicare Part D claims for 64 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Michael Krosin, MD's MIPS final score?
The 2023 MIPS final score is 91 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.