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OPTUMCARE COLORADO MEDICAL GROUP LLC
NPI 1922893478
Internal Medicine - Rheumatology in Boulder, CO

Active since April 14, 2025
2503 WALNUT ST STE 200, BOULDER, CO 80302(720) 494-4700(720) 494-4706 Get Directions Write a Review

NPPES record last updated: April 14, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Optumcare Colorado Medical Group Llc NPPES

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

OPTUMCARE COLORADO MEDICAL GROUP LLC (NPI 1922893478), doing business as Colorado Center For Arthritis & Osteoporosis, is a healthcare organization registered as a rheumatology in Boulder, Colorado and active in the NPI registry since April 2025. The organization lists Emily Castillo, Associate Director, as its authorized official.

NPPES Registry Identity

NPI1922893478
Entity TypeOrganization
Primary Taxonomy207RR0500X
Legal Business NameOPTUMCARE COLORADO MEDICAL GROUP LLC
Location Address2503 WALNUT ST STE 200Boulder, CO 80302-5745
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(720) 494-4700
Fax(720) 494-4706
Organization SubpartNo
Authorized OfficialEmily CastilloAssociate Director · (702) 480-2550
Enumeration DateApril 14, 2025
NPPES CertifiedApril 14, 2025
✔ NPI 1922893478 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
2503 WALNUT ST STE 200, Boulder, CO 80302
Open in Google Maps ↗

Other Names 1

Doing Business AsColorado Center For Arthritis & Osteoporosis

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Optumcare Colorado Medical Group Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

314

Medicare enrollment records show 314 clinicians reassign Medicare billing to Optumcare Colorado Medical Group LLC, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 7 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 25

Family Practice97
Nurse Practitioner76
Internal Medicine42
Pediatric Medicine21
Certified Registered Nurse Anesthetist (CRNA)16
Rheumatology11
Hospitalist9
Diagnostic Radiology8
17 other specialties34

Nearest to this location (20)

See all 314
Joseph Lutt, M.D.
Rheumatology
NPI 1023233707
2503 WALNUT ST STE 200
Boulder, CO 80302
(720) 494-4706
✔ PECOS✔ Accepts MedicareSame address
Shiraz Moinuddin, M.D.
Rheumatology
NPI 1063600336
2503 WALNUT ST STE 200
Boulder, CO 80302
(720) 494-4700
✔ PECOS✔ Accepts MedicareSame address
Derek Berg, DO
Internal Medicine
NPI 1194896969
100 HEALTH PARK DR
Louisville, CO 80027
(303) 643-1159
✔ PECOS✔ Accepts Medicare7.6 mi
Andrew Chernaik, MD
Internal Medicine
NPI 1306818620
100 HEALTH PARK DR
Louisville, CO 80027
(303) 673-1000
✔ PECOS7.6 mi
Lia Matarrese Mcgibbon, DO
Rheumatology
NPI 1144464454
1910 COALTON RD
Superior, CO 80027
(720) 494-4700
✔ PECOS✔ Accepts Medicare8.9 mi
Sara Shahid, MD
Internal Medicine
NPI 1972063956
1910 COALTON RD
Broomfield, CO 80020
(720) 494-4700
✔ PECOS8.9 mi
Emily Samson, M.D.
Family Practice
NPI 1619532355
280 EXEMPLA CIR
Lafayette, CO 80026
(303) 338-4545
✔ PECOS✔ Accepts Medicare9.8 mi
Shawna De Graff Roberson, D.O.
Internal Medicine
NPI 1265823256
340 E 1ST AVE STE 102
Broomfield, CO 80020
(720) 798-0170
✔ PECOS✔ Accepts Medicare13 mi
Kylie Beukema, MD
Family Practice
NPI 1174918346
11552 SHERIDAN BLVD
Westminster, CO 80020
(303) 469-6000
✔ PECOS✔ Accepts Medicare14 mi
Renee Calcaterra, APN
Nurse Practitioner
NPI 1932502762
11552 SHERIDAN BLVD
Westminster, CO 80020
(303) 469-6000
✔ PECOS✔ Accepts Medicare14 mi
Daniel Erhardt, M.D.
Rheumatology
NPI 1467870212
1715 IRON HORSE DR STE 150
Longmont, CO 80501
(720) 494-4700
✔ PECOS✔ Accepts Medicare14 mi
Georgie Philip, MD
Pediatric Medicine
NPI 1871098830
3260 E 104TH AVE
Thornton, CO 80233
(720) 929-8300
✔ PECOS19 mi
Alexandra Garnett, MD
Physical Medicine and Rehabilitation
NPI 1639556707
2801 YOUNGFIELD ST STE 150
Golden, CO 80401
(303) 238-4277
✔ PECOS✔ Accepts Medicare19 mi
Kevin Hinshaw, MD
Ophthalmology
NPI 1215151097
2704 MARTINGALE DR
Berthoud, CO 80513
(314) 604-4716
✔ PECOS20 mi
Tisha Fujii, DO
Hospitalist
NPI 1720092596
1707 COLE BLVD STE 100
Golden, CO 80401
(303) 763-4900
✔ PECOS✔ Accepts Medicare20 mi
Scott London, MD
Neurology
NPI 1457448250
1707 COLE BLVD STE 150
Golden, CO 80401
(303) 716-8802
✔ PECOS✔ Accepts Medicare20 mi
Julia Riley, DPM
Podiatry
NPI 1215011689
1707 COLE BLVD STE 150
Golden, CO 80401
(303) 719-8027
✔ PECOS✔ Accepts Medicare20 mi
Andrea Salzberg, MD
Endocrinology
NPI 1043325624
1707 COLE BLVD STE 150
Golden, CO 80401
(303) 763-4900
✔ PECOS✔ Accepts Medicare20 mi
Bridget Rogers, M.D.
Diagnostic Radiology
NPI 1154564672
1746 COLE BLVD SUITE 150
Lakewood, CO 80401
(303) 914-8800
✔ PECOS✔ Accepts Medicare20 mi
Philip Emrie, M.D.
Pulmonary Disease
NPI 1720081086
1536 COLE BLVD STE 4-250
Lakewood, CO 80401
(303) 716-8027
✔ PECOS20 mi
See all 314 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Optumcare Colorado Medical Group LLC's NPI number?

The NPI number for Optumcare Colorado Medical Group LLC is 1922893478. It was assigned to this organization in the NPPES registry on April 14, 2025. The provider is doing business as Colorado Center for Arthritis & Osteoporosis.

Where is Optumcare Colorado Medical Group LLC located?

Optumcare Colorado Medical Group LLC is located at 2503 Walnut St Ste 200, Boulder, CO 80302. The listed phone number is (720) 494-4700.

What is Optumcare Colorado Medical Group LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Optumcare Colorado Medical Group LLC enrolled in Medicare?

Yes. Optumcare Colorado Medical Group LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Optumcare Colorado Medical Group LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 314 clinicians in 25 Medicare specialties reassign their Medicare billing to Optumcare Colorado Medical Group LLC. A 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 the clinician's services. The largest specialties are Family Practice (97), Nurse Practitioner (76) and Internal Medicine (42). Of these, 2 practice at this address and 7 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Optumcare Colorado Medical Group LLC was last updated on April 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.