Dr. Daniel Anthony Grier, MD
- Medicare services, 2024
- 45
- Medicare patients, 2024
- 114
- Hospital affiliations
- 2
- Industry payments
- $100
- Medical group
- 1
- Practice address
- 250 Bon Air Road, Greenbrae, CA 94904
- Practice phone
- Call (415) 925-7900
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Daniel Anthony Grier is an anesthesiologist in Greenbrae, California
Dr. Grier practices at MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District.
Dr. Grier's NPI, 1730718909, was assigned on April 8, 2020. Dr. Grier graduated from Icahn School Of Medicine At Mount Sinai in 2020. Dr. Grier's California license number on file is A188878.
- NPI
- 1730718909NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2860896974
- NPI enumeration date
- April 8, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 925-7900
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel Anthony Grier practices at MarinHealth Medical Center in Greenbrae, California
Dr. Grier's primary practice is MarinHealth Medical Center, at 250 Bon Air Road, Greenbrae, CA 94904 in Marin County. The practice phone is (415) 925-7900.
- MarinHealth Medical Center250 Bon Air Road, Greenbrae, CA 94904 · Marin CountyPhone(415) 925-7900
Source: Dmand AI Affiliation Data
Dr. Daniel Anthony Grier is affiliated with 2 sites of care and 1 medical group
Dr. Grier's primary practice is MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District. Dr. Grier is also affiliated with Novato Community Hospital. The medical group on file is Anesthesiology Consultants of Marin.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Daniel Anthony Grier's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grier practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MarinHealth Medical Center | 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. Daniel Anthony Grier is one of 6,593 anesthesiologists in California
Anesthesiology is Dr. Grier's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Grier has a license on file in California.
Specialties and state licenses
- Anesthesiology, CaliforniaPrimary
Anesthesiologists near Dr. Grier
Counts of anesthesiologists 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. Daniel Anthony Grier billed Medicare for 45 services in 2024
CMS data shows 45 Medicare services from Dr. Grier across 3 procedure codes in 2024, for 114 Medicare patients. Medicare paid $4,029 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Grier's Medicare services by type, 2024
- Anesthesia32
- Surgery13
Dr. Grier compared with the California median for anesthesiologists, 2024
- Dr. Grier
- California median
- Medicare services
- 45vs 7238% below
- Medicare patients
- 114vs 14320% below
Medians across 5,562 anesthesiologists in California with Dmand AI profiles that report each measure.
Dr. Grier'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. Grier?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grier and other anesthesiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel Anthony Grier treated 114 Medicare patients in 2024, average age 76
CMS counts 114 Medicare patients who saw Dr. Grier in 2024. The largest group is 75 to 84, with 50 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 16% are also on Medicaid. Their average risk score is 1.56, 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. Grier's median patient age at 62, with 42% women.
Dr. Grier's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Grier's Medicare patients by sex, 2024
- Women5246%
- Men6254%
Chronic conditions among Dr. Grier's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis46%
- Ischemic heart disease42%
- Anxiety33%
- Chronic kidney disease31%
- Atrial fibrillation27%
- Mood disorders24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grier's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women42%
- Men57%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Daniel Anthony Grier takes part in Medicare
Dr. Grier 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. Daniel Anthony Grier received $100 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Grier from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Fisher & Paykel Healthcare Inc paid the most, $100.
Companies that paid Dr. Grier 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. Daniel Anthony Grier graduated from Icahn School Of Medicine At Mount Sinai
Dr. Grier graduated from Icahn School Of Medicine At Mount Sinai in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Daniel Anthony Grier accepts plans from 2 insurance carriers
Dr. Grier is in network with 2 carriers, including Blue Cross Blue Shield of Michigan and CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- CMS Medicare
Plan types Dr. Grier accepts, by number of carriers
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Daniel Anthony Grier'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. Daniel Anthony Grier
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. Daniel Anthony Grier's NPI number?
Dr. Daniel Anthony Grier's NPI number is 1730718909. It was assigned on April 8, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Anthony Grier?
Dr. Daniel Anthony Grier is an anesthesiologist in Greenbrae, California. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Daniel Anthony Grier practice?
Dr. Grier practices at 250 Bon Air Road, Greenbrae, CA 94904. Dr. Grier's primary practice is MarinHealth Medical Center in Greenbrae, California, part of Marin Healthcare District.
What is Dr. Daniel Anthony Grier's office phone number?
The practice phone on file for Dr. Grier is (415) 925-7900.
What is Dr. Daniel Anthony Grier's medical license number?
Dr. Grier's California license number on file is A188878.
Which hospitals is Dr. Daniel Anthony Grier affiliated with?
Dr. Grier practices at MarinHealth Medical Center in Greenbrae, California. Dr. Grier is also affiliated with Novato Community Hospital.
What medical group is Dr. Daniel Anthony Grier part of?
Dr. Grier is linked to Anesthesiology Consultants of Marin.
Does Dr. Daniel Anthony Grier accept Medicare?
Yes. CMS data shows Dr. Grier billed Medicare for 45 services in 2024, and Dr. Grier accepts Medicare assignment.
How many Medicare patients does Dr. Daniel Anthony Grier see?
CMS counts 114 Medicare patients who saw Dr. Grier in 2024, with an average age of 76.
What services does Dr. Daniel Anthony Grier bill to Medicare?
In 2024, Dr. Grier's most billed Medicare services were anesthesia (00811), surgery: heart and blood vessels (36620) and anesthesia (00731).
Show 4 more questionsShow fewer questions
Where did Dr. Daniel Anthony Grier go to medical school?
Dr. Grier graduated from Icahn School Of Medicine At Mount Sinai in 2020.
Has Dr. Daniel Anthony Grier received payments from drug or device companies?
CMS Open Payments shows $100 in general payments to Dr. Grier from 1 company from 2025 to 2025. The largest total came from Fisher & Paykel Healthcare Inc.
How long has Dr. Daniel Anthony Grier been practicing?
Dr. Grier graduated from medical school in 2020, 6 years ago.
What insurance does Dr. Daniel Anthony Grier accept?
Dr. Grier is in network with 2 carriers, including Blue Cross Blue Shield of Michigan and CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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