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CATHERINE A. RYAN M.D.
NPI 1730295940
Obstetrics & Gynecology - Gynecology in Boulder, CO

Active since August 21, 2006PECOS EnrolledAccepts Medicare Assignment
4745 ARAPAHOE AVE STE 110, BOULDER, CO 80303(303) 444-5110(303) 444-7457 Get Directions Write a Review

NPPES record last updated: April 6, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Catherine A. Ryan M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CATHERINE A. RYAN M.D. (NPI 1730295940) is an individual gynecology provider in Boulder, Colorado, licensed in Colorado (40191) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1998).

NPPES Registry Identity

NPI1730295940
Entity TypeIndividualFemale
Primary Taxonomy207VG0400X
Provider Legal NameCATHERINE A. RYANCredential: M.D.
Location Address4745 ARAPAHOE AVE STE 110Boulder, CO 80303-1082
Mailing Address4745 Arapahoe Ave Ste 110Boulder, CO 80303-1082 · (303) 444-5110 · Fax (303) 444-7457
Phone(303) 444-5110
Fax(303) 444-7457
Sole ProprietorNo
Medical School CMSOtherGraduated 1998
Enumeration DateAugust 21, 2006
Last NPPES UpdateApril 6, 2017
✔ NPI 1730295940 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & Gynecology · GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207VG0400X
License✔ Licensed in CO · 40191
Definition
A physician who specializes in diagnosis, treatment, and management of patients with gynecologic conditions. Source: National Uniform Claim Committee
4745 ARAPAHOE AVE STE 110, Boulder, CO 80303
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Other Identifiers 1

Medicare UPINH67206CO

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Catherine A. Ryan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3779570585
PECOS Enrollment IDI20040426000996
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Catherine Ryan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Obstetrix Medical Group Of Colorado P C
23 mi
Pediatric Cardiology
2055 HIGH STREET, STE 255
Denver, CO 80205
  • Reassigned Medicare billing, Colorado enrollment
  • 118 clinicians in this Medicare group
NPI 1497779276 (303) 860-9933

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 80303 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$132.55 typical visit price
range $58.06 – $174.82
Typical copayment $33.13 (range $14.51 – $43.70)
Most-billed visit code 99204
Established Patient
$72.20 typical visit price
range $18.88 – $142.79
Typical copayment $18.05 (range $4.72 – $35.69)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LAUREN N WEAVER P.A.
Physician Assistant
4745 ARAPAHOE AVE STE 110
BOULDER, CO 80303
Boulder County (303) 444-5110
SARAH ELIZABETH CURZON PA-C
Physician Assistant
4745 ARAPAHOE AVE STE 110
BOULDER, CO 80303
Boulder County (303) 444-5110
MADISON DREW LOHMANN WHCNP
Nurse Practitioner (Women's Health)
4745 ARAPAHOE AVE STE 110
BOULDER, CO 80303
Boulder County (303) 444-5110
MARY A MACSALKA M.D.
Obstetrics & Gynecology (Gynecology)
4745 ARAPAHOE AVE STE 110
BOULDER, CO 80303
Boulder County (303) 444-5110
CHRISTINE C HANSEN M.D.
Obstetrics & Gynecology (Gynecology)
4745 ARAPAHOE AVE STE 110
BOULDER, CO 80303
Boulder County (303) 444-5110
CCHMD CORP
Obstetrics & Gynecology (Gynecology)
4745 ARAPAHOE AVE STE 110
BOULDER, CO 80303
Boulder County (303) 444-5110

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 Catherine Ryan's NPI number?

The NPI number for Catherine Ryan is 1730295940. It was assigned to this individual provider in the NPPES registry on August 21, 2006.

Where is Catherine Ryan located?

Catherine Ryan practices at 4745 Arapahoe Ave Ste 110, Boulder, CO 80303. The listed phone number is (303) 444-5110.

What is Catherine Ryan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecology, with taxonomy code 207VG0400X.

Is Catherine Ryan enrolled in Medicare?

Yes. Catherine Ryan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Catherine Ryan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Ryan reassigns Medicare benefits to Obstetrix Medical Group Of Colorado P C (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 Catherine Ryan'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 Catherine Ryan was last updated on April 6, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.