Dr. Gary Austin Grimes, MD
- Medicare services, 2024
- 4,224
- Medicare patients, 2024
- 227
- Part D claims, 2024
- 10,271
- Hospital affiliations
- 8
- Industry payments
- $106
- Practice address
- 15107 Vanowen St, Vannuys, CA 91405
- Practice phone
- Call (818) 782-6600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Grimes' 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 Austin Grimes is a family medicine physician in Vannuys, California
Dr. Grimes practices at Valley Presbyterian Hospital in Vannuys, California, part of Valley Presbyterian Hospital.
Dr. Grimes' NPI, 1922172089, was assigned on November 20, 2006. Dr. Grimes graduated from Ross University School of Medicine in 1984. Dr. Grimes holds California license A45278.
- NPI
- 1922172089NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1557375656
- NPI enumeration date
- November 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (818) 782-6600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary Austin Grimes practices at Valley Presbyterian Hospital in Vannuys, California
Dr. Grimes' primary practice is Valley Presbyterian Hospital, at 15107 Vanowen St, Vannuys, CA 91405 in Los Angeles County. The practice phone is (818) 782-6600.
- Valley Presbyterian Hospital15107 Vanowen St, Vannuys, CA 91405 · Los Angeles CountyPhone(818) 782-6600
Source: Dmand AI Affiliation Data
Dr. Gary Austin Grimes is affiliated with 23 sites of care
Dr. Grimes' primary practice is Valley Presbyterian Hospital in Vannuys, California, part of Valley Presbyterian Hospital. Dr. Grimes is also affiliated with Kindred Hospital Baldwin Park. Dmand AI also links Dr. Grimes to 6 more hospitals, 5 home health agencies, 5 hospices, 4 skilled nursing facilities and 1 physician office, each 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 Austin Grimes' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grimes practices, 23 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Valley Presbyterian Hospital | Available with a free account |
| +22 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Valley Presbyterian Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gary Austin Grimes is one of 15,680 family medicine physicians in California
Family medicine is Dr. Grimes' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dmand AI has Dr. Grimes' licenses on file in 3 states: California, Hawaii and Pennsylvania.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
- Hawaii license
- Pennsylvania license
Clinical focus
Dmand AI lists acute respiratory failure, anemia, asthma, cellulitis, chronic anemia, chronic diabetes, chronic hypertension and chronic kidney disease among the conditions Dr. Grimes treats.
Family medicine physicians near Dr. Grimes
Counts of family medicine physicians 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 Austin Grimes billed Medicare for 4,224 services in 2024
CMS data shows 4,224 Medicare services from Dr. Grimes across 10 procedure codes in 2024, for 227 Medicare patients. Medicare paid $231,963 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grimes' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3,0812024: 4,22437%
Dr. Grimes compared with the California median for family medicine physicians, 2024
- Dr. Grimes
- California median
- Medicare services
- 4,224vs 24617.2 times
- Medicare patients
- 227vs 11892% above
- Part D claims
- 9,446vs 83311.3 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Grimes' 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. Grimes and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary Austin Grimes treated 227 Medicare patients in 2024, average age 73
CMS counts 227 Medicare patients who saw Dr. Grimes in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have copd, and 75% have high blood pressure. 94% are also on Medicaid. Their average risk score is 3.89, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Grimes' median patient age at 75, with 54% women.
Dr. Grimes' Medicare patients by age, 2024
Dr. Grimes' Medicare patients by sex, 2024
- Women10546%
- Men12254%
Chronic conditions among Dr. Grimes' Medicare patients, 2024
- COPD75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders74%
- Schizophrenia and other psychoses69%
- Alzheimer's and dementia68%
- Anxiety67%
- Arthritis66%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grimes' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary Austin Grimes wrote 10,271 Medicare Part D claims in 2024
In 2024, Dr. Grimes wrote 10,271 Medicare Part D claims for 349 patients. 87% of them were for generic drugs. CMS names the drug for 9,446 of them, across 190 drugs with 11 or more claims each, at $577,934 in total drug cost. In 2023, CMS named 7,930 claims across 160 drugs.
Dr. Grimes' Part D claims by kind of drug, 2024
- Generic8,944 claims87%
- Brand-name1,237 claims12%
- Other90 claims1%
Dr. Grimes' 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. Grimes' Part D claims, 2024
- Opioids1%60 of 10,271 claims
- Antibiotics1%121 of 10,271 claims
- Antipsychotics, patients 65 and over2%248 of 10,271 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: 7,9302024: 9,44619%
Drugs named by CMS: 190 in 2024, 160 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 Austin Grimes takes part in Medicare
Dr. Grimes 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 Austin Grimes received $106 in industry payments from 2018 to 2023
CMS Open Payments shows 5 general payments to Dr. Grimes from 3 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. Neurocrine BioSciences, Inc. paid the most, $39.
General payments to Dr. Grimes by program year, 2018 to 2023
Companies that paid Dr. Grimes the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary Austin Grimes graduated from Ross University School of Medicine
Dr. Grimes graduated from Ross University School of Medicine in 1984.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Gary Austin Grimes accepts plans from 1 insurance carrier
Dr. Grimes is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary Austin Grimes'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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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 |
| 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. Gary Austin Grimes
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 Austin Grimes' NPI number?
Dr. Gary Austin Grimes' NPI number is 1922172089. It was assigned on November 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary Austin Grimes?
Dr. Gary Austin Grimes is a family medicine physician in Vannuys, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Gary Austin Grimes practice?
Dr. Grimes practices at 15107 Vanowen St, Vannuys, CA 91405. Dr. Grimes' primary practice is Valley Presbyterian Hospital in Vannuys, California, part of Valley Presbyterian Hospital. Dmand AI also links Dr. Grimes to 6 hospitals, 5 home health agencies, 5 hospices, 4 skilled nursing facilities and 1 physician office.
What is Dr. Gary Austin Grimes' office phone number?
The practice phone on file for Dr. Grimes is (818) 782-6600.
What is Dr. Gary Austin Grimes' medical license number?
Dr. Grimes holds California license A45278, one of the licenses on file in 3 states.
Which states has Dr. Gary Austin Grimes been licensed in?
Dmand AI has state licenses on file for Dr. Grimes in California (1988 to 2026), Hawaii (1988 to 2026) and Pennsylvania (1987 to 1988).
Which hospitals is Dr. Gary Austin Grimes affiliated with?
Dr. Grimes practices at Valley Presbyterian Hospital in Vannuys, California. Dr. Grimes is also affiliated with Kindred Hospital Baldwin Park. Dmand AI links Dr. Grimes to 6 more hospitals.
Does Dr. Gary Austin Grimes accept Medicare?
Yes. CMS data shows Dr. Grimes billed Medicare for 4,224 services in 2024, and Dr. Grimes accepts Medicare assignment.
How many Medicare patients does Dr. Gary Austin Grimes see?
CMS counts 227 Medicare patients who saw Dr. Grimes in 2024, with an average age of 73.
What services does Dr. Gary Austin Grimes bill to Medicare?
In 2024, Dr. Grimes' most billed Medicare services were hospital inpatient care (99231), hospital inpatient care (99232) and nursing facility care (99307).
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Where did Dr. Gary Austin Grimes go to medical school?
Dr. Grimes graduated from Ross University School of Medicine in 1984.
What drugs does Dr. Gary Austin Grimes prescribe most?
In 2024 Medicare Part D data, Dr. Grimes' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Metformin HCl.
Has Dr. Gary Austin Grimes received payments from drug or device companies?
CMS Open Payments shows $106 in general payments to Dr. Grimes from 3 companies from 2018 to 2023. The largest total came from Neurocrine BioSciences, Inc.
How long has Dr. Gary Austin Grimes been practicing?
Dr. Grimes graduated from medical school in 1984, 42 years ago.
What insurance does Dr. Gary Austin Grimes accept?
Dr. Grimes is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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