Physician Profile
Unclaimed ProfileAbout ERNSTOFF
Based in Meriden, CT, Jon J Ernstoff, M.D. is listed in the NPI registry under gastroenterology. Jon is also listed as specialising in internal medicine. Medicare claims data shows Jon provided 28 services to 25 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Ernstoff specialise in?
Dr. Ernstoff is a gastroenterology in Meriden, CT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GASTROENTEROLOGY”.
NPI registry
Where is Dr. Ernstoff located?
Dr. Ernstoff is listed at 455 LEWIS AVE SUITE 106, Meriden, CT 06451. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Ernstoff's phone number?
The number on file is (203) 886-0036. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Ernstoff?
Dr. Ernstoff's National Provider Identifier is 1598789653. 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
Where did Dr. Ernstoff go to medical school?
Dr. Ernstoff attended Other, graduating in 1978. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Ernstoff have?
Dr. Ernstoff has 48 years experience. Calculated from a graduation year of 1978, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Ernstoff do most often?
According to Medicare billing data, Dr. Ernstoff the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Ernstoff's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Ernstoff. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (203) 886-0036
- Email not available
Practice Locations
455 LEWIS AVE SUITE 106
Meriden, CT 06451
Procedures Most Often Billed to Medicare
28 services · 25 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
16 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other gastroenterology specialists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 6
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 — 18 related providers in 3 groups
Other gastroenterology specialists in Meriden 2
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1978 at Other 8
Providers who graduated from the same medical school in the same year.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.