DR. ANN L RYAN MD
NPI 1528198371
Pediatrics - Neonatal-Perinatal Medicine in Denver, CO
About Dr. Ann L Ryan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANN L RYAN MD (NPI 1528198371) is an individual neonatal-perinatal medicine provider in Denver, Colorado, licensed in Colorado (43670) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Ann L Ryan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ann Ryan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Denver, CO 80218
- Reassigned Medicare billing, Colorado enrollment
- 1,270 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.
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.
DENVER, CO 80218
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 Ann Ryan's NPI number?
The NPI number for Ann Ryan is 1528198371. It was assigned to this individual provider in the NPPES registry on March 7, 2007. The provider is also known as Ann P Ladd MD.
Where is Ann Ryan located?
Ann Ryan practices at 1375 E 19th Ave, Denver, CO 80218. The listed phone number is (303) 338-4545.
What is Ann Ryan's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.
Is Ann Ryan enrolled in Medicare?
Yes. Ann Ryan is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ann Ryan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ann Ryan reassigns Medicare benefits to Intermountain Medical Group Denver, LLC (Denver, CO). The 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 Ann Ryan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ann Ryan accept?
Health plans from Select Health list Ann Ryan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Ann Ryan was last updated on June 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. Ann L Ryan, MD · NPI 1528198371
Neonatal-Perinatal Medicine physician in Denver, Colorado. Individual provider, active in the CMS NPPES registry since March 7, 2007.
## Identity
- **NPI:** 1528198371 (Entity type: Individual)
- **Enumerated:** March 7, 2007
- **Primary specialty:** Pediatrics - Neonatal-Perinatal Medicine · taxonomy 2080N0001X
- **State license:** 43670 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 1375 E 19TH AVE, Denver, CO 80218-1114
- **Phone:** (303) 338-4545
## 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:** Intermountain Medical Group Denver, LLC (NPI 1558975953, Denver, CO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 14, 2021
- **Other identifiers:** Medicaid 13950274 (CO); Other 016406
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Source: [NPI Profile](https://npiprofile.com/npi/1528198371) · Data from the CMS NPPES public registry.