Physician Profile

Sean Grammy, D.O.

Unclaimed Profile

About Dr. Grammy

Sean Grammy, D.O. is a healthcare provider in Antioch, CA specializing in emergency medicine. Sean is also listed as specializing in internal medicine. Medicare claims data shows Sean provided 650 services to 642 patients. The services billed most often include emergency department visit with high level of medical decision making, critical care, first 30-74 minutes, and emergency department visit with moderate level of medical decision making.

Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.

Specialty

Emergency Medicine (Primary)
Internal Medicine (Additional)

Credentials & Licensing

CA license20A13122
NPI1982832127
NPI issued06/25/2009

License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.

Medicare information

Medicare opt-outNo
Can order and refer in MedicareYes

Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.

Common questions

What does Sean Grammy specialize in?

Sean Grammy is an emergency physician in Antioch, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Emergency Medicine”.

NPI registry

Where is Sean Grammy located?

Sean Grammy is listed at 3901 Lone Tree Way, Antioch, CA 94509. Addresses come from the NPI registry and can lag a move, so confirm before travelling.

NPI registry

What is Sean Grammy's phone number?

The number on file is (925) 779-7200. Guide.md cannot book appointments or pass on messages — please call the office directly.

NPI registry

What is the NPI for Sean Grammy?

Sean Grammy's National Provider Identifier is 1982832127. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.

NPI registry

How much experience does Sean Grammy have?

Sean Grammy has 17+ years experience. Registered with an NPI since 2009. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.

NPI registry

What does Sean Grammy do most often?

According to Medicare billing data, Sean Grammy provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report only, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.

Medicare claims

Is Sean Grammy's profile verified?

Not yet. This profile is built from public federal data and has not been confirmed by Sean Grammy. If this is you, claiming it is free.

Guide.md

Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.