Mark Ashton Ritchie, M.D.
Psychiatry Physician · Morgan Hill, CA
Mark Ashton Ritchie, M.D. is a psychiatry physician with a practice address in Morgan Hill, California, and NPI 1962683060, issued on Nov 16, 2007. Check the license (California A48077, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Ashton Ritchie
- Credential
- M.D.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- A48077 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1156 Teresa Lane, Morgan Hill, CA 95037
- Phone
- (408) 402-0450
- Enumerated
- Nov 16, 2007
- Record last updated
- Jun 5, 2023
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Verify Mark Ashton Ritchie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A48077Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average psychiatry physician in 2024
627 Medicare Part D claims for 51 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Mirtazapine36 claims
- Venlafaxine Hcl Er36 claims
- Trazodone Hcl34 claims
- Bupropion Xl31 claims
- Bupropion Hcl Sr25 claims
- Invega Sustenna25 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.
Mark Ashton Ritchie among 8,673 psychiatry physician records in California
Mark Ashton Ritchie, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 33% of them.
- NPI issued2007 · 33% of these records are older, 48% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 38% of these records are
- Record last updated2023 · 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 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 psychiatry physician records list a practice address in Morgan Hill
They are 8 of the 626 NPPES records with a practice address in Morgan Hill, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in Morgan Hill → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Ricki-Leigh Brampton, M.D.Morgan Hill, CA 950371487964755
- Matthew Lilly, MDMorgan Hill, CA 950371346571643
- David Ly, DOMorgan Hill, CA 950371598159741
- Paul Michaels, M.D.Morgan Hill, CA 950371649548264
- Ruth Mondolfi, D.O.Morgan Hill, CA 950371568704641
- James Reichmuth, M.D.Morgan Hill, CA 950371699890236
- Maryjoe Romando, DOMorgan Hill, CA 950371821291030
- Anjum Ahmed, M.D.Milpitas, CA 950351730520636
Common questions
What is Mark Ashton Ritchie, M.D.'s NPI number?
Mark Ashton Ritchie, M.D.'s National Provider Identifier (NPI) is 1962683060, issued on Nov 16, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mark Ashton Ritchie, M.D. located?
The NPPES record lists a practice address at 1156 Teresa Lane, Morgan Hill, CA, 95037. Phone: (408) 402-0450. Providers update this record themselves, so call before visiting.
How can I verify Mark Ashton Ritchie, M.D.'s license?
NPPES lists California license number A48077, 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 Ashton Ritchie, M.D. prescribe under Medicare Part D?
In 2024, Mark Ashton Ritchie, M.D. had 627 Medicare Part D claims for 51 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.