Dr. Gary Michael Rooker, DO
- Medicare services, 2017
- 20
- Part D claims, 2024
- 546
- Industry payments
- $121
- Affiliated sites
- 2
- State license
- 1
- Practice address
- 1 California St, San Francisco, CA 94111
- Practice phone
- Call (800) 997-6196
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Doctor on Demand
Urgent Care Center · San Francisco, California
Find Dr. Rooker'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. Gary Michael Rooker is a psychiatrist in San Francisco, California
Dr. Rooker practices at Doctor on Demand in San Francisco, California.
Dr. Rooker's NPI, 1679630107, was assigned on January 3, 2007. Dr. Rooker graduated from Michigan State University College of Osteopathic Medicine in 1991. Dr. Rooker holds Virginia license 0102050157.
- NPI
- 1679630107NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103921267
- NPI enumeration date
- January 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (800) 997-6196
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary Michael Rooker practices at Doctor on Demand in San Francisco, California
Dr. Rooker's primary practice is Doctor on Demand, at 1 California St, San Francisco, CA 94111. The practice phone is (800) 997-6196.
- Doctor on Demand1 California St, San Francisco, CA 94111Phone(800) 997-6196
Source: Dmand AI Affiliation Data
Dr. Gary Michael Rooker is affiliated with 2 sites of care
Dr. Rooker's primary practice is Doctor on Demand in San Francisco, California. Dmand AI also links Dr. Rooker to 1 physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary Michael Rooker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rooker practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Doctor on Demand | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary Michael Rooker is one of 6,803 psychiatrists in California
Psychiatry is Dr. Rooker's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Rooker is licensed in Virginia.
Specialties and state licenses
- Psychiatry, VirginiaPrimary
Psychiatrists near Dr. Rooker
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. Gary Michael Rooker billed Medicare for 20 services in 2017
CMS data shows 20 Medicare services from Dr. Rooker across 1 procedure code in 2017, all of them office visits. Medicare paid $1,207 for them. Every service was in an office.
Dr. Rooker's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 912017: 2078%
- Tests and treatments
- 2016: 1082017: 0100%
Dr. Rooker compared with the California median for psychiatrists, 2017
- Dr. Rooker
- California median
- Medicare services
- 20vs 11983% below
- Part D claims
- 432vs 1443.0 times
Medians across 6,809 psychiatrists in California with Dmand AI profiles that report each measure.
Dr. Rooker's most billed Medicare procedure codes, 2017
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. Rooker and other psychiatrists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary Michael Rooker's patients have a median age of 27
Across all payers, Dmand AI patient panel data puts Dr. Rooker's median patient age at 27, with 50% women.
Dr. Rooker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 27
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Gary Michael Rooker wrote 546 Medicare Part D claims in 2024
In 2024, Dr. Rooker wrote 546 Medicare Part D claims for 33 patients. 95% of them were for generic drugs. CMS names the drug for 432 of them, across 21 drugs with 11 or more claims each, at $21,981 in total drug cost. In 2023, CMS named 406 claims across 19 drugs.
Dr. Rooker's Part D claims by kind of drug, 2024
- Generic521 claims95%
- Brand-name and other25 claims5%
Dr. Rooker'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. Rooker's Part D claims, 2024
- Antipsychotics, patients 65 and over6%31 of 546 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: 4062024: 4326%
Drugs named by CMS: 21 in 2024, 19 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
How Dr. Gary Michael Rooker takes part in Medicare
Dr. Rooker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gary Michael Rooker received $121 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Rooker from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $121.
Companies that paid Dr. Rooker the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary Michael Rooker graduated from Michigan State University College of Osteopathic Medicine
Dr. Rooker graduated from Michigan State University College of Osteopathic Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gary Michael Rooker'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Gary Michael Rooker
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. Gary Michael Rooker's NPI number?
Dr. Gary Michael Rooker's NPI number is 1679630107. It was assigned on January 3, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary Michael Rooker?
Dr. Gary Michael Rooker is a psychiatrist in San Francisco, California. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Gary Michael Rooker practice?
Dr. Rooker practices at 1 California St, San Francisco, CA 94111. Dr. Rooker's primary practice is Doctor on Demand in San Francisco, California. Dmand AI also links Dr. Rooker to 1 physician office.
What is Dr. Gary Michael Rooker's office phone number?
The practice phone on file for Dr. Rooker is (800) 997-6196.
What is Dr. Gary Michael Rooker's medical license number?
Dr. Rooker holds Virginia license 0102050157.
Does Dr. Gary Michael Rooker accept Medicare?
Yes. CMS data shows Dr. Rooker billed Medicare for 20 services in 2017, and Dr. Rooker accepts Medicare assignment.
What services does Dr. Gary Michael Rooker bill to Medicare?
In 2017, Dr. Rooker's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Gary Michael Rooker go to medical school?
Dr. Rooker graduated from Michigan State University College of Osteopathic Medicine in 1991.
What drugs does Dr. Gary Michael Rooker prescribe most?
In 2024 Medicare Part D data, Dr. Rooker's most prescribed drugs by claims were Olanzapine, Clonazepam and Quetiapine Fumarate.
Has Dr. Gary Michael Rooker received payments from drug or device companies?
CMS Open Payments shows $121 in general payments to Dr. Rooker from 1 company from 2025 to 2025. The largest total came from Abbvie Inc.
How long has Dr. Gary Michael Rooker been practicing?
Dr. Rooker graduated from medical school in 1991, 35 years ago.
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