Antipsychotic AgentsAnxietyBlood Pressure
Dr. Mark Ashton Ritchie, MD
NPI1962683060
- Medicare services, 2023
- 91
- Part D claims, 2024
- 627
- Publications
- 2
- Insurance carriers
- 3
- State licenses
- 3
- Practice address
- 1450 Koll Cir, San Jose, CA 95112
- Practice phone
- Call (408) 402-0450
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Ritchie's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Ashton Ritchie is a psychiatrist in San Jose, California
Dr. Ritchie practices in San Jose, California.
Dr. Ritchie's NPI, 1962683060, was assigned on November 16, 2007. Dr. Ritchie graduated from LSU Health Sciences Center New Orleans - School of Medicine in 1988. Dr. Ritchie's California license number on file is A48077.
NPI and contact details
- NPI
- 1962683060NPI Registry (opens in a new tab)
- NPI enumeration date
- November 16, 2007
- NPI status
- Active
- Practice phone
- (408) 402-0450
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
Dr. Mark Ashton Ritchie's practice address is in San Jose, California
Dr. Ritchie's practice address in the NPI Registry is 1450 Koll Cir, San Jose, CA 95112, in Santa Clara County. The practice phone is (408) 402-0450.
- NPI Registry address1450 Koll Cir, San Jose, CA 95112 · Santa Clara CountyPhone(408) 402-0450
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Mark Ashton Ritchie's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ritchie practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dr. Ritchie's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Ashton Ritchie is one of 6,803 psychiatrists in California
Psychiatry is Dr. Ritchie's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Ritchie is board certified in psychiatry by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Ritchie's licenses on file in 3 states: California, Virginia and Louisiana.
Specialties and state licenses
- Psychiatry, CaliforniaPrimary
- Virginia license
- Louisiana license
Clinical focus
Dmand AI lists anxiety, bipolar disorder, depression and schizophrenia among the conditions Dr. Ritchie treats.
Psychiatrists near Dr. Ritchie
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Ashton Ritchie billed Medicare for 91 services in 2023
CMS data shows 91 Medicare services from Dr. Ritchie across 1 procedure code in 2023, all of them office visits. Medicare paid $8,133 for them. Every service was in an office.
Medicare services, 202391
Paid by Medicare$8,133
Procedure codes1
Dr. Ritchie's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1092023: 9117%
Dr. Ritchie compared with the California median for psychiatrists, 2023
- Dr. Ritchie
- California median
- Medicare services
- 91vs 11924% below
- Part D claims
- 498vs 1443.5 times
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Ritchie's most billed Medicare procedure codes, 2023
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Ashton Ritchie's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Ritchie's median patient age at 59, with 67% women.
Dr. Ritchie's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women67%
- Men33%
Source: Dmand AI Patient Panel Data
Dr. Mark Ashton Ritchie wrote 627 Medicare Part D claims in 2024
In 2024, Dr. Ritchie wrote 627 Medicare Part D claims for 51 patients. 85% of them were for generic drugs. CMS names the drug for 498 of them, across 25 drugs with 11 or more claims each, at $104,345 in total drug cost. In 2023, CMS named 939 claims across 33 drugs.
Part D claims, 2024627
Drugs named by CMS25
Total drug cost$104,345
Part D patients51
Dr. Ritchie's Part D claims by kind of drug, 2024
- Generic536 claims85%
- Brand-name91 claims15%
Dr. Ritchie's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ritchie's Part D claims, 2024
- Antipsychotics, patients 65 and over5%30 of 627 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 9392024: 49847%
Drugs named by CMS: 25 in 2024, 33 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Mark Ashton Ritchie has 2 publications on record
Dmand AI links 2 papers to Dr. Ritchie in 2007. The most frequent topics are Schizophrenia and Schizophrenic Psychology. Dr. Ritchie's most frequent co-author is Mark Harold Townsend, MD.
Papers2
Topics Dr. Ritchie writes about most
- Schizophrenia
- Schizophrenic Psychology
Dr. Ritchie's most frequent co-authors
Recent publications by Dr. Ritchie
J Abnorm Psychol
AttentionEmotionsFacial Expression
See who Dr. Ritchie researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ritchie works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Ashton Ritchie graduated from LSU Health Sciences Center New Orleans - School of Medicine
Dr. Ritchie graduated from LSU Health Sciences Center New Orleans - School of Medicine in 1988.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. Mark Ashton Ritchie accepts plans from 3 insurance carriers
Dr. Ritchie is in network with 3 carriers, including Blue Cross Blue Shield of Massachusetts, Elevance and HCSC. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
Plan types Dr. Ritchie accepts, by number of carriers
- PPO3
- Medicare2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Mark Ashton Ritchie's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Ashton Ritchie
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Ashton Ritchie's NPI number?
Dr. Mark Ashton Ritchie's NPI number is 1962683060. It was assigned on November 16, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Ashton Ritchie?
Dr. Mark Ashton Ritchie is a psychiatrist in San Jose, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Mark Ashton Ritchie practice?
Dr. Ritchie practices at 1450 Koll Cir, San Jose, CA 95112.
What is Dr. Mark Ashton Ritchie's office phone number?
The practice phone on file for Dr. Ritchie is (408) 402-0450.
What is Dr. Mark Ashton Ritchie's medical license number?
Dr. Ritchie's California license number on file is A48077, one of the licenses on file in 3 states.
Which states has Dr. Mark Ashton Ritchie been licensed in?
Dmand AI has state licenses on file for Dr. Ritchie in California (1990 to 2025), Virginia (2023 to 2026) and Louisiana (1988 to 2000).
Does Dr. Mark Ashton Ritchie accept Medicare?
Yes. CMS data shows Dr. Ritchie billed Medicare for 91 services in 2023.
Is Dr. Mark Ashton Ritchie board certified?
Yes. Dr. Ritchie is board certified in psychiatry by the American Board of Psychiatry and Neurology.
What services does Dr. Mark Ashton Ritchie bill to Medicare?
In 2023, Dr. Ritchie's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Mark Ashton Ritchie go to medical school?
Dr. Ritchie graduated from LSU Health Sciences Center New Orleans - School of Medicine in 1988.
Show 5 more questionsShow fewer questions
What drugs does Dr. Mark Ashton Ritchie prescribe most?
In 2024 Medicare Part D data, Dr. Ritchie's most prescribed drugs by claims were Mirtazapine, Venlafaxine HCl ER and Trazodone HCl.
How long has Dr. Mark Ashton Ritchie been practicing?
Dr. Ritchie graduated from medical school in 1988, 38 years ago.
Does Dr. Mark Ashton Ritchie do research?
Dmand AI links 2 publications to Dr. Ritchie.
Who does Dr. Mark Ashton Ritchie publish with?
Dr. Ritchie's most frequent co-authors are Mark Harold Townsend, MD (2 shared papers).
What insurance does Dr. Mark Ashton Ritchie accept?
Dr. Ritchie is in network with 3 carriers, including Blue Cross Blue Shield of Massachusetts, Elevance and HCSC. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.
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