Dr. Simon M. Ritchken, MD
- Medicare services, 2024
- 1,160
- Medicare patients, 2024
- 379
- Part D claims, 2024
- 1,326
- MIPS score, 2024
- 24
- Hospital affiliations
- 3
- Practice address
- 4282 Genesee Ave Suite 103 Suite 103, San Diego, CA 92117-4961
- Practice phone
- Call (858) 292-0108
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ritchken And First Medical Group
Primary care practice · San Diego, California
Find Dr. Ritchken'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. Simon M. Ritchken is an internist in San Diego, California
Dr. Ritchken practices at Ritchken And First Medical Group in San Diego, California.
Dr. Ritchken's NPI, 1255399341, was assigned on May 1, 2006. Dr. Ritchken holds California license A34151.
- NPI
- 1255399341NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0941112189
- NPI enumeration date
- May 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (858) 292-0108
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 79
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Simon M. Ritchken practices at Ritchken and First Medical Group in San Diego, California
Dr. Ritchken's primary practice is Ritchken and First Medical Group, at 4282 Genesee Ave Suite 103 Suite 103, San Diego, CA 92117-4961. The practice phone is (858) 292-0108.
- Ritchken and First Medical Group4282 Genesee Ave Suite 103 Suite 103, San Diego, CA 92117-4961Phone(858) 292-0108
Source: Dmand AI Affiliation Data
Dr. Simon M. Ritchken is affiliated with 5 sites of care and 2 medical groups
Dr. Ritchken's primary practice is Ritchken And First Medical Group in San Diego, California. Dr. Ritchken is also affiliated with Sharp Memorial Hospital. The medical group on file is Emergency and Acute Care Medical Corporation. Dmand AI also links Dr. Ritchken to 2 more hospitals, 1 group practice or clinic and 1 medical group, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Simon M. Ritchken's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ritchken practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ritchken And First Medical Group | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Simon M. Ritchken is one of 16,751 internists in California
Internal medicine is Dr. Ritchken's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Ritchken is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Ritchken
Counts of internists 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. Simon M. Ritchken billed Medicare for 1,160 services in 2024
CMS data shows 1,160 Medicare services from Dr. Ritchken across 14 procedure codes in 2024, for 379 Medicare patients. Medicare paid $94,211 for them.
Dr. Ritchken's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6542024: 6956%
- Surgery
- 2023: 3092024: 3307%
- Lab and pathology
- 2023: 822024: 9111%
- Other services
- 2023: 372024: 4419%
Where Dr. Ritchken's Medicare services took place, 2024
- In an office96083%
- In a facility20017%
Dr. Ritchken compared with the California median for internists, 2024
- Dr. Ritchken
- California median
- Medicare services
- 1,160vs 3613.2 times
- Medicare patients
- 379vs 1512.5 times
- Part D claims
- 901vs 4212.1 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Ritchken's most billed Medicare procedure codes, 2024
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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ritchken and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Simon M. Ritchken treated 379 Medicare patients in 2024, average age 76
CMS counts 379 Medicare patients who saw Dr. Ritchken in 2024. The largest group is 65 to 74, with 167 patients. 69% of them have high cholesterol, and 63% have high blood pressure. 20% are also on Medicaid. Their average risk score is 1.06, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ritchken's median patient age at 63, with 48% women.
Dr. Ritchken's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Ritchken's Medicare patients by sex, 2024
- Women18449%
- Men19551%
Chronic conditions among Dr. Ritchken's Medicare patients, 2024
- High cholesterol69%
- High blood pressure63%
- Arthritis42%
- Diabetes24%
- Ischemic heart disease24%
- Osteoporosis21%
- Chronic kidney disease20%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ritchken's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Simon M. Ritchken wrote 1,326 Medicare Part D claims in 2024
In 2024, Dr. Ritchken wrote 1,326 Medicare Part D claims for 302 patients. 91% of them were for generic drugs. CMS names the drug for 901 of them, across 29 drugs with 11 or more claims each, at $32,430 in total drug cost. In 2023, CMS named 843 claims across 27 drugs.
Dr. Ritchken's Part D claims by kind of drug, 2024
- Generic1,209 claims91%
- Brand-name and other117 claims9%
Dr. Ritchken'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. Ritchken's Part D claims, 2024
- Opioids1%12 of 1,326 claims
- Antibiotics3%38 of 1,326 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: 8432024: 9017%
Drugs named by CMS: 29 in 2024, 27 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
Dr. Simon M. Ritchken scored 24 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 24 out of 100 for Dr. Ritchken for performance year 2024, reported individually. Dr. Ritchken accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ritchken as offering telehealth. CMS counts 140 procedures of colonoscopy by Dr. Ritchken, more than 87% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Ritchken's MIPS scores, performance year 2024
- 24of 100Final score
- 0of 100Quality
- 0of 100Improvement Activities
- 80of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Ritchken ranks in Medicare procedure volume
- Colonoscopy
- 87th percentile140 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 73rd percentile83 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Simon M. Ritchken received $15,306 in industry payments from 2016 to 2025
CMS Open Payments shows 784 general payments to Dr. Ritchken from 80 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 97% of the total. Janssen Pharmaceuticals, Inc paid the most, $1,386.
General payments to Dr. Ritchken by program year, 2016 to 2025
General payments to Dr. Ritchken by kind, 2016 to 2025
- Food and beverage$14,91397%
- Education$1501%
- Gifts$1281%
- Consulting fees$1141%
Companies that paid Dr. Ritchken the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Simon M. Ritchken's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Simon M. Ritchken
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. Simon M. Ritchken's NPI number?
Dr. Simon M. Ritchken's NPI number is 1255399341. It was assigned on May 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Simon M. Ritchken?
Dr. Simon M. Ritchken is an internist in San Diego, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Simon M. Ritchken practice?
Dr. Ritchken practices at 4282 Genesee Ave Suite 103 Suite 103, San Diego, CA 92117-4961. Dr. Ritchken's primary practice is Ritchken And First Medical Group in San Diego, California. Dmand AI also links Dr. Ritchken to 2 hospitals, 1 group practice or clinic and 1 medical group.
What is Dr. Simon M. Ritchken's office phone number?
The practice phone on file for Dr. Ritchken is (858) 292-0108.
What is Dr. Simon M. Ritchken's medical license number?
Dr. Ritchken holds California license A34151.
Which hospitals is Dr. Simon M. Ritchken affiliated with?
Dr. Ritchken is affiliated with Sharp Memorial Hospital. Dmand AI links Dr. Ritchken to 2 more hospitals.
What medical group is Dr. Simon M. Ritchken part of?
Dr. Ritchken is linked to Emergency and Acute Care Medical Corporation. Dmand AI links Dr. Ritchken to 1 more medical group.
Does Dr. Simon M. Ritchken accept Medicare?
Yes. CMS data shows Dr. Ritchken billed Medicare for 1,160 services in 2024, and Dr. Ritchken accepts Medicare assignment.
Does Dr. Simon M. Ritchken offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ritchken as offering telehealth services.
What is Dr. Simon M. Ritchken's MIPS score?
Dr. Ritchken's MIPS final score for performance year 2024 is 24 out of 100, reported individually.
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How many Medicare patients does Dr. Simon M. Ritchken see?
CMS counts 379 Medicare patients who saw Dr. Ritchken in 2024, with an average age of 76.
What services does Dr. Simon M. Ritchken bill to Medicare?
In 2024, Dr. Ritchken's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and office visit, new patient (99204).
What drugs does Dr. Simon M. Ritchken prescribe most?
In 2024 Medicare Part D data, Dr. Ritchken's most prescribed drugs by claims were Omeprazole, Pantoprazole Sodium and Sod Sulf-Potass Sulf-Mag Sulf.
Has Dr. Simon M. Ritchken received payments from drug or device companies?
CMS Open Payments shows $15,306 in general payments to Dr. Ritchken from 80 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Simon M. Ritchken been practicing?
Dr. Ritchken graduated from medical school in 1973, 53 years ago.
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