Dr. John Allen Garrison, DO
- Medicare services, 2024
- 3,168
- Medicare patients, 2024
- 565
- Part D claims, 2024
- 318
- MIPS score, 2024
- 90
- Hospital affiliations
- 7
- Practice address
- 620 Shadow Lane, Las Vegas, NV 89106
- Practice phone
- Call (702) 388-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Garrison's professional email, personal email and mobile number
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Dr. John Allen Garrison is an internist in Las Vegas, Nevada
Dr. Garrison practices at Valley Hospital Medical Center in Las Vegas, Nevada, part of Universal Health Services.
Dr. Garrison's NPI, 1902284870, was assigned on May 12, 2015. Dr. Garrison holds Nevada license DO2406.
- NPI
- 1902284870NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426357864
- NPI enumeration date
- May 12, 2015
- NPI status
- Active
- Offers telehealth
- Yes
- Practice phone
- (702) 388-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Allen Garrison practices at Valley Hospital Medical Center in Las Vegas, Nevada
Dr. Garrison's primary practice is Valley Hospital Medical Center, at 620 Shadow Lane, Las Vegas, NV 89106 in Clark County. The practice phone is (702) 388-4000.
- Valley Hospital Medical Center620 Shadow Lane, Las Vegas, NV 89106 · Clark CountyPhone(702) 388-4000
Source: Dmand AI Affiliation Data
Dr. John Allen Garrison is affiliated with 14 sites of care and 7 medical groups
Dr. Garrison's primary practice is Valley Hospital Medical Center in Las Vegas, Nevada, part of Universal Health Services. Dr. Garrison is also affiliated with PAM Health Specialty Hospital of Las Vegas. The medical group on file is TeamHealth. Dmand AI also links Dr. Garrison to 5 more hospitals, 6 medical groups, 4 group practices and clinics, 2 home health agencies and 1 skilled nursing facility, 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. John Allen Garrison's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Garrison practices, 14 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Valley Hospital Medical Center | Available with a free account |
| +13 more sites and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Allen Garrison is one of 1,019 internists in Nevada
Internal medicine is Dr. Garrison's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Garrison is licensed in Nevada.
Specialties and state licenses
- Internal medicine, NevadaPrimary
Internists near Dr. Garrison
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. John Allen Garrison billed Medicare for 3,168 services in 2024
CMS data shows 3,168 Medicare services from Dr. Garrison across 20 procedure codes in 2024, for 565 Medicare patients. Medicare paid $229,656 for them.
Dr. Garrison's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,4342024: 2,900102%
- Surgery
- 2023: 1022024: 208104%
- Tests and treatments
- 2023: 02024: 60
Where Dr. Garrison's Medicare services took place, 2024
- In an office1,52348%
- In a facility1,64552%
Dr. Garrison compared with the Nevada median for internists, 2024
- Dr. Garrison
- Nevada median
- Medicare services
- 3,168vs 5206.1 times
- Medicare patients
- 565vs 1913.0 times
- Part D claims
- 86vs 36476% below
Medians across 935 internists in Nevada with Dmand AI profiles that report each measure.
Dr. Garrison'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Allen Garrison treated 565 Medicare patients in 2024, average age 75
CMS counts 565 Medicare patients who saw Dr. Garrison in 2024. The largest group is 75 to 84, with 195 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 36% are also on Medicaid. Their average risk score is 3.43, 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. Garrison's median patient age at 70, with 45% women.
Dr. Garrison's Medicare patients by age, 2024
Dr. Garrison's Medicare patients by sex, 2024
- Women28851%
- Men27749%
Chronic conditions among Dr. Garrison's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes64%
- Arthritis61%
- Ischemic heart disease57%
- Chronic kidney disease55%
- Heart failure54%
- Mood disorders52%
Share of Medicare patients with each condition. A patient can have several.
Dr. Garrison's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Allen Garrison wrote 318 Medicare Part D claims in 2024
In 2024, Dr. Garrison wrote 318 Medicare Part D claims for 46 patients. 80% of them were for generic drugs. CMS names the drug for 86 of them, across 5 drugs with 11 or more claims each, at $1,353 in total drug cost. In 2022, CMS named 24 claims across 2 drugs.
Dr. Garrison's Part D claims by kind of drug, 2024
- Generic254 claims80%
- Brand-name and other64 claims20%
Dr. Garrison'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. Garrison's Part D claims, 2024
- Antibiotics6%20 of 318 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, 2022 to 2024
- 2022
- 2024
- Claims for drugs CMS names
- 2022: 242024: 86258%
Drugs named by CMS: 5 in 2024, 2 in 2022.
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. John Allen Garrison scored 90 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 90 out of 100 for Dr. Garrison for performance year 2024, reported through an alternative payment model (APM). CMS lists Dr. Garrison as offering telehealth. CMS counts 155 procedures of removal of tissue by Dr. Garrison, more than 89% of the clinicians it reports for that procedure.
- Offers telehealth
- Yes
Dr. Garrison's MIPS scores, performance year 2024
- 90of 100Final score
- 73of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Garrison ranks in Medicare procedure volume
- Removal of tissue
- 89th percentile155 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of nail tissue: 1 to 10 procedures (CMS shows small counts as a range)
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 1 to 10 procedures (CMS shows small counts as a range)
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
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. John Allen Garrison received $15,446 in industry payments from 2016 to 2025
CMS Open Payments shows 264 general payments to Dr. Garrison from 44 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 61% of the total. Coloplast Corp paid the most, $3,591.
General payments to Dr. Garrison by program year, 2016 to 2025
General payments to Dr. Garrison by kind, 2016 to 2025
- Food and beverage$9,40061%
- Travel and lodging$5,68837%
- Education$3592%
Companies that paid Dr. Garrison 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. John Allen Garrison'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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. John Allen Garrison
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. John Allen Garrison's NPI number?
Dr. John Allen Garrison's NPI number is 1902284870. It was assigned on May 12, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. John Allen Garrison?
Dr. John Allen Garrison is an internist in Las Vegas, Nevada. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Allen Garrison practice?
Dr. Garrison practices at 620 Shadow Lane, Las Vegas, NV 89106. Dr. Garrison's primary practice is Valley Hospital Medical Center in Las Vegas, Nevada, part of Universal Health Services. Dmand AI also links Dr. Garrison to 5 hospitals, 6 medical groups, 4 group practices and clinics, 2 home health agencies and 1 skilled nursing facility.
What is Dr. John Allen Garrison's office phone number?
The practice phone on file for Dr. Garrison is (702) 388-4000.
What is Dr. John Allen Garrison's medical license number?
Dr. Garrison holds Nevada license DO2406.
Which hospitals is Dr. John Allen Garrison affiliated with?
Dr. Garrison practices at Valley Hospital Medical Center in Las Vegas, Nevada. Dr. Garrison is also affiliated with PAM Health Specialty Hospital of Las Vegas. Dmand AI links Dr. Garrison to 5 more hospitals.
What medical group is Dr. John Allen Garrison part of?
Dr. Garrison is linked to TeamHealth. Dmand AI links Dr. Garrison to 6 more medical groups.
Does Dr. John Allen Garrison accept Medicare?
Yes. CMS data shows Dr. Garrison billed Medicare for 3,168 services in 2024.
Does Dr. John Allen Garrison offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Garrison as offering telehealth services.
What is Dr. John Allen Garrison's MIPS score?
Dr. Garrison's MIPS final score for performance year 2024 is 90 out of 100, reported through an alternative payment model (APM).
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How many Medicare patients does Dr. John Allen Garrison see?
CMS counts 565 Medicare patients who saw Dr. Garrison in 2024, with an average age of 75.
What services does Dr. John Allen Garrison bill to Medicare?
In 2024, Dr. Garrison's most billed Medicare services were nursing facility care (99308), hospital inpatient care (99232) and nursing facility care (99309).
What drugs does Dr. John Allen Garrison prescribe most?
In 2024 Medicare Part D data, Dr. Garrison's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Memantine HCl.
Has Dr. John Allen Garrison received payments from drug or device companies?
CMS Open Payments shows $15,446 in general payments to Dr. Garrison from 44 companies from 2016 to 2025. The largest total came from Coloplast Corp.
How long has Dr. John Allen Garrison been practicing?
Dr. Garrison graduated from medical school in 2015, 11 years ago.
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