Dr. Justin N. Grammy, DO
- Medicare services, 2024
- 256
- Medicare patients, 2024
- 123
- Hospital affiliations
- 4
- Industry payments
- $161
- Medical groups
- 3
- Practice address
- 1911 Johnson Ave, San Luis Obispo, CA 93401
- Practice phone
- Call (805) 543-5353
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Grammy'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. Justin N. Grammy is a hospitalist in San Luis Obispo, California
Dr. Grammy practices at Dignity Health - French Hospital Medical Center in San Luis Obispo, California, part of CommonSpirit Health.
Dr. Grammy's NPI, 1003254483, was assigned on June 7, 2013. Dr. Grammy graduated from WesternU College of Osteopathic Medicine of the Pacific in 2013. Dr. Grammy holds California license 16620.
- NPI
- 1003254483NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274804752
- NPI enumeration date
- June 7, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 543-5353
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Justin N. Grammy practices at Dignity Health - French Hospital Medical Center in San Luis Obispo, California
Dr. Grammy's primary practice is Dignity Health - French Hospital Medical Center, at 1911 Johnson Ave, San Luis Obispo, CA 93401 in San Luis Obispo County. The practice phone is (805) 543-5353.
- Dignity Health - French Hospital Medical Center1911 Johnson Ave, San Luis Obispo, CA 93401 · San Luis Obispo CountyPhone(805) 543-5353
Source: Dmand AI Affiliation Data
Dr. Justin N. Grammy is affiliated with 5 sites of care and 3 medical groups
Dr. Grammy's primary practice is Dignity Health - French Hospital Medical Center in San Luis Obispo, California, part of CommonSpirit Health. Dr. Grammy is also affiliated with Adventist Health Sierra Vista. The medical group on file is Central Coast Chest Consultants. Dmand AI also links Dr. Grammy to 2 more hospitals, 2 medical groups and 1 group practice or clinic, 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. Justin N. Grammy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grammy practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Dignity Health - French Hospital Medical Center | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Justin N. Grammy is one of 3,186 hospitalists in California
Hospitalist is Dr. Grammy's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Grammy is board certified in critical care medicine (caq) by the AOA Board of Internal Medicine. Dmand AI has Dr. Grammy's licenses on file in 4 states: California, Iowa, Illinois and Pennsylvania.
Specialties and state licenses
- Hospitalist, CaliforniaPrimary
- Iowa license
- Illinois license
- Internal medicine, Pennsylvania
Clinical focus
Dmand AI lists alcohol use disorders, atrial fibrillation and flutter, chronic diabetes, chronic hypertension, heart blockage, heart failure, high cholesterol and pulmonary embolism among the conditions Dr. Grammy treats.
Hospitalists near Dr. Grammy
Counts of hospitalists 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. Justin N. Grammy billed Medicare for 256 services in 2024
CMS data shows 256 Medicare services from Dr. Grammy across 2 procedure codes in 2024, for 123 Medicare patients. Medicare paid $37,719 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grammy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2622024: 2562%
Dr. Grammy compared with the California median for hospitalists, 2024
- Dr. Grammy
- California median
- Medicare services
- 256vs 43040% below
- Medicare patients
- 123vs 20139% below
Medians across 2,991 hospitalists in California with Dmand AI profiles that report each measure.
Dr. Grammy'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.
Need commercial claims for Dr. Grammy?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grammy and other hospitalists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Justin N. Grammy treated 123 Medicare patients in 2024, average age 76
CMS counts 123 Medicare patients who saw Dr. Grammy in 2024. The largest group is 75 to 84, with 53 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 30% are also on Medicaid. Their average risk score is 2.03, 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. Grammy's median patient age at 65, with 32% women.
Dr. Grammy's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Grammy's Medicare patients by sex, 2024
- Women4738%
- Men7662%
Chronic conditions among Dr. Grammy's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Atrial fibrillation55%
- Ischemic heart disease55%
- Heart failure54%
- Arthritis45%
- Chronic kidney disease45%
- Anxiety38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grammy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women32%
- Men67%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Justin N. Grammy takes part in Medicare
Dr. Grammy 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. Justin N. Grammy received $161 in industry payments from 2016 to 2017
CMS Open Payments shows 4 general payments to Dr. Grammy from 3 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $129.
General payments to Dr. Grammy by program year, 2016 to 2017
Companies that paid Dr. Grammy the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Justin N. Grammy graduated from WesternU College of Osteopathic Medicine of the Pacific
Dr. Grammy graduated from WesternU College of Osteopathic Medicine of the Pacific in 2013. Dr. Grammy is a member of AOA.
- Medical school
- Board certified in critical care medicine (caq)
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Justin N. Grammy accepts plans from 9 insurance carriers
Dr. Grammy is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Amerihealth Caritas
- CMS Medicare
- DE State Medicaid
- +1 more carriersWith a free account
Plan types Dr. Grammy accepts, by number of carriers
- Medicare7
- PPO5
- HMO2
- Medicaid2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Justin N. Grammy'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) |
| 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. Justin N. Grammy
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. Justin N. Grammy's NPI number?
Dr. Justin N. Grammy's NPI number is 1003254483. It was assigned on June 7, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin N. Grammy?
Dr. Justin N. Grammy is a hospitalist in San Luis Obispo, California. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Justin N. Grammy practice?
Dr. Grammy practices at 1911 Johnson Ave, San Luis Obispo, CA 93401. Dr. Grammy's primary practice is Dignity Health - French Hospital Medical Center in San Luis Obispo, California, part of CommonSpirit Health. Dmand AI also links Dr. Grammy to 2 hospitals, 2 medical groups and 1 group practice or clinic.
What is Dr. Justin N. Grammy's office phone number?
The practice phone on file for Dr. Grammy is (805) 543-5353.
What is Dr. Justin N. Grammy's medical license number?
Dr. Grammy holds California license 16620, one of the licenses on file in 4 states.
Which states has Dr. Justin N. Grammy been licensed in?
Dmand AI has state licenses on file for Dr. Grammy in California (2018 to 2027), Iowa (2024 to 2026), Illinois (2024 to 2026) and Pennsylvania (2013 to 2018).
Which hospitals is Dr. Justin N. Grammy affiliated with?
Dr. Grammy practices at Dignity Health - French Hospital Medical Center in San Luis Obispo, California. Dr. Grammy is also affiliated with Adventist Health Sierra Vista. Dmand AI links Dr. Grammy to 2 more hospitals.
What medical group is Dr. Justin N. Grammy part of?
Dr. Grammy is linked to Central Coast Chest Consultants. Dmand AI links Dr. Grammy to 2 more medical groups.
Does Dr. Justin N. Grammy accept Medicare?
Yes. CMS data shows Dr. Grammy billed Medicare for 256 services in 2024, and Dr. Grammy accepts Medicare assignment.
How many Medicare patients does Dr. Justin N. Grammy see?
CMS counts 123 Medicare patients who saw Dr. Grammy in 2024, with an average age of 76.
Show 6 more questionsShow fewer questions
Is Dr. Justin N. Grammy board certified?
Yes. Dr. Grammy is board certified in critical care medicine (caq) by the AOA Board of Internal Medicine.
What services does Dr. Justin N. Grammy bill to Medicare?
In 2024, Dr. Grammy's most billed Medicare services were critical care (99291) and hospital inpatient care (99233).
Where did Dr. Justin N. Grammy go to medical school?
Dr. Grammy graduated from WesternU College of Osteopathic Medicine of the Pacific in 2013.
Has Dr. Justin N. Grammy received payments from drug or device companies?
CMS Open Payments shows $161 in general payments to Dr. Grammy from 3 companies from 2016 to 2017. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Justin N. Grammy been practicing?
Dr. Grammy graduated from medical school in 2013, 13 years ago.
What insurance does Dr. Justin N. Grammy accept?
Dr. Grammy is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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