JOHN E GRUNOW MD
NPI 1679541981
Pediatrics - Pediatric Gastroenterology in Oklahoma City, OK
About John E Grunow Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN E GRUNOW MD (NPI 1679541981) is an individual pediatric gastroenterology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (11004) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
John E Grunow Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show John Grunow reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Oklahoma City, OK 73104
- Reassigned Medicare billing, Oklahoma enrollment
- 845 clinicians in this Medicare group
Oklahoma City, OK 73104
- Reassigned Medicare billing, Oklahoma enrollment
- 1,795 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 73104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OKLAHOMA CITY, OK 73104
OKLAHOMA CITY, OK 73104
OKLAHOMA CITY, OK 73104
OKLAHOMA CITY, OK 73104
OKLAHOMA CITY, OK 73104
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Grunow's NPI number?
The NPI number for John Grunow is 1679541981. It was assigned to this individual provider in the NPPES registry on March 11, 2006.
Where is John Grunow located?
John Grunow practices at 1200 N Phillips Ave Suite 9500, Oklahoma City, OK 73104. The listed phone number is (405) 271-6549.
What is John Grunow's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.
Is John Grunow enrolled in Medicare?
Yes. John Grunow is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for John Grunow's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Grunow reassigns Medicare benefits to 2 organizations: Board Of Regents Of The University Of Oklahoma - Ou Physicians (Oklahoma City, OK) and Ou Health Partners, Inc (Oklahoma City, OK). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Grunow's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Grunow was last updated on January 18, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John E Grunow, MD · NPI 1679541981
Pediatric Gastroenterology physician in Oklahoma City, Oklahoma. Individual provider, active in the CMS NPPES registry since March 11, 2006.
## Identity
- **NPI:** 1679541981 (Entity type: Individual)
- **Enumerated:** March 11, 2006
- **Primary specialty:** Pediatrics - Pediatric Gastroenterology · taxonomy 2080P0206X
- **State license:** 11004 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 1200 N PHILLIPS AVE, SUITE 9500, Oklahoma City, OK 73104-4600
- **Phone:** (405) 271-6549 · **Fax:** (405) 271-7866
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Board Of Regents Of The University Of Oklahoma - Ou Physicians (NPI 1801869250, Oklahoma City, OK); Ou Health Partners, Inc (NPI 1528642642, Oklahoma City, OK) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 18, 2011
- **Other identifiers:** Medicare PIN 24R604831
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Source: [NPI Profile](https://npiprofile.com/npi/1679541981) · Data from the CMS NPPES public registry.