Physician Profile
Unclaimed ProfileAbout GNATT
Michael Aaron Gnatt, MD practices internal medicine in Rockville, MD. According to Medicare claims data, Michael cared for 140 Medicare patients across 262 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (301) 990-3193
- Email not available
Practice Locations
14955 SHADY GROVE RD SUITE 100
Rockville, MD 20850
Procedures Most Often Billed to Medicare
262 services · 140 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
95 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
12 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
139 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
16 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other internists at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 16 related providers in 2 groups
Other internists in Rockville 8
Same specialty, same city.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in MD who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Gnatt?
Dr. Gnatt is an internist in Rockville, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “Internal Medicine”.
NPI registry
What is Dr. Gnatt's address?
Dr. Gnatt is listed at 14955 SHADY GROVE RD SUITE 100, Rockville, MD 20850. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Gnatt?
The number on file is (301) 990-3193. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Gnatt's NPI number?
Dr. Gnatt's National Provider Identifier is 1255392866. 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 long has Dr. Gnatt been practicing?
Dr. Gnatt has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What procedures does Dr. Gnatt perform?
According to Medicare billing data, Dr. Gnatt performs procedures including insertion of needle into vein for collection of blood sample; provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Gnatt confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gnatt. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.