Physician Profile
Unclaimed ProfileAbout GRENN
Based in Corpus Christi, TX, John Caleb Grenn, M.D. is listed in the NPI registry under pediatric medicine. John Caleb graduated from University of Mississippi School of Medicine in 2017. John Caleb is also listed as specializing in internal medicine. Medicare claims data shows John Caleb provided 484 services to 241 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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (877) 832-2652
- Email not available
Practice Locations
3315 S ALAMEDA ST
Corpus Christi, TX 78411
Procedures Most Often Billed to Medicare
484 services · 241 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
265 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
123 |
| Hospital discharge day management, 30 minutes or less | Office visit | 99238 |
48 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
48 |
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.
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.
Other pediatric medicines in Corpus Christi 8
Same specialty, same city.
Trained at University of Mississippi School of Medicine 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2017 at University of Mississippi School of Medicine 8
Providers who graduated from the same medical school in the same year.
Common questions
What kind of doctor is Dr. Grenn?
Dr. Grenn is a pediatric medicine in Corpus Christi, TX. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PEDIATRIC MEDICINE”.
NPI registry
What is Dr. Grenn's address?
Dr. Grenn is listed at 3315 S ALAMEDA ST, Corpus Christi, TX 78411. 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. Grenn?
The number on file is (877) 832-2652. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Grenn?
Dr. Grenn's National Provider Identifier is 1225569635. 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. Grenn train?
Dr. Grenn attended University of Mississippi School of Medicine, graduating in 2017. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Grenn have?
Dr. Grenn has 9 years experience. Calculated from a graduation year of 2017, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Grenn perform?
According to Medicare billing data, Dr. Grenn 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. Grenn's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Grenn. 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.