Mark Steven Spitzer
Otolaryngology Physician · Merced, CA
Mark Steven Spitzer is an otolaryngology physician with a practice address in Merced, California, and NPI 1407848435, issued on Aug 16, 2005. Check the license (California 20A5347, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Steven Spitzer
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License number
- 20A5347 CA
Self-reported in NPPES; status is on the state search - Practice location
- 410 E Yosemite Ave Ste B, Merced, CA 95340
- Phone
- (209) 934-8077
- Enumerated
- Aug 16, 2005
- Record last updated
- Dec 16, 2025
- Fax
- (209) 233-9400
- Medicare enrollment
- Enrolled (PECOS I20040326000960); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 410 E Yosemite Ave Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicolette Pinocchio, FNP-CNurse Practitioner1972282069
- Sherri Prisaznik, MAAudiologist1710048723
Verify Mark Steven Spitzer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A5347Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average otolaryngology physician in 2024
1,348 Medicare Part D claims for 292 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims. 14 claims were for opioids.
Most prescribed
- Levothyroxine Sodium452 claims
- Fluticasone Propionate143 claims
- Levocetirizine Dihydrochloride116 claims
- Omeprazole115 claims
- Azelastine Hcl96 claims
- Synthroid86 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 MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Timothy S Johnston MD PCMerced, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Steven Spitzer among 1,212 otolaryngology physician records in California
Mark Steven Spitzer is one of 1,212 otolaryngology physician records with a practice address in California. 80% 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, 93% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1981 · median 2004 among the 818 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Merced → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Kenneth Mak, MDModesto, CA 953501427007798
- Douglas Phan, M.D.Modesto, CA 953501013073766
- Charles Yates, M.D.Modesto, CA 953501750334116
- Aren Francis, MDModesto, CA 953551982630901
- Charles Suntra, MDModesto, CA 953551619934056
- Mark Bitgood, MDModesto, CA 953561457439945
- Phyllis Peng, MDModesto, CA 953561770633596
- Christopher Whang, MDModesto, CA 953561639257124
Common questions
What is Mark Steven Spitzer's NPI number?
Mark Steven Spitzer's National Provider Identifier (NPI) is 1407848435, issued on Aug 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark Steven Spitzer located?
The NPPES record lists a practice address at 410 E Yosemite Ave Ste B, Merced, CA, 95340. Phone: (209) 934-8077. Providers update this record themselves, so call before visiting.
How can I verify Mark Steven Spitzer's license?
NPPES lists California license number 20A5347, 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 Mark Steven Spitzer prescribe under Medicare Part D?
In 2024, Mark Steven Spitzer had 1,348 Medicare Part D claims for 292 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is Mark Steven Spitzer's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. 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.