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DENVER DIGESTIVE HEALTH SPECIALISTS INC
NPI 1447278981
Internal Medicine - Gastroenterology in Denver, CO

Active since July 17, 2006
4500 E 9TH AVE STE 720S, DENVER, CO 80220(303) 355-3525(303) 355-0255 Get Directions Write a Review

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

Record update history: Feb 14, 2025, Aug 22, 2020 (2 updates tracked since 2020).

About Denver Digestive Health Specialists Inc NPPES

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

DENVER DIGESTIVE HEALTH SPECIALISTS INC (NPI 1447278981), doing business as Drs Linkow Siegel, is a healthcare organization registered as a gastroenterology in Denver, Colorado and active in the NPI registry since July 2006. The organization lists Jonathan Fishman, Authorized Official, as its authorized official.

NPPES Registry Identity

NPI1447278981
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameDENVER DIGESTIVE HEALTH SPECIALISTS INC
Location Address4500 E 9TH AVE STE 720SDenver, CO 80220-3926
Mailing Address4500 E 9th Ave, 720 SDenver, CO 80220 · (303) 355-3525 · Fax (303) 355-0255
Phone(303) 355-3525
Fax(303) 355-0255
Organization SubpartNo
Authorized OfficialJonathan FishmanAuthorized Official · (303) 355-3525
Enumeration DateJuly 17, 2006
Last NPPES UpdateFebruary 14, 20252 updates tracked since enumeration
NPPES CertifiedFebruary 14, 2025
✔ NPI 1447278981 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
4500 E 9TH AVE STE 720S, Denver, CO 80220
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Other Names 1

Former Legal Business NameDrs Linkow Siegel

Other Identifiers 1

Medicaid04021028CO

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)

Denver Digestive Health Specialists Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

37

Medicare enrollment records show 37 clinicians reassign Medicare billing to Denver Digestive Health Specialists Inc, which bills Medicare for the services they deliver. Of these, 9 practice at this address and 21 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 5

Certified Registered Nurse Anesthetist (CRNA)15
Anesthesiology10
Gastroenterology7
Internal Medicine3
Pathology2

Nearest to this location (20)

See all 37
Jonathon Fishman, MD
Gastroenterology
NPI 1104813559
4500 E 9TH AVE STE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Lawrence Miller, M.D.
Gastroenterology
NPI 1912116732
4500 E 9TH AVE STE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Jennifer Brenner, M.D.
Gastroenterology
NPI 1760611305
4500 E 9TH AVE STE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Kevin Sieja, M.D.
Gastroenterology
NPI 1952356677
4500 E 9TH AVE STE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Jonathan Scott, D.O.
Internal Medicine
NPI 1033645460
4500 E 9TH AVE STE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Laura Wolfe, M.D.
Gastroenterology
NPI 1053468942
4500 E 9TH AVE SUITE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Stephen New, M.D.
Internal Medicine
NPI 1730488099
4500 E 9TH AVE STE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Julie Polson, MD
Gastroenterology
NPI 1154350270
4500 E 9TH AVE SUITE 720S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Daniel Siegel, MD
Internal Medicine
NPI 1174518344
4500 E 9TH AVE #720 S
Denver, CO 80220
(303) 355-3525
✔ PECOS✔ Accepts MedicareSame address
Jill Stovall, M.D.
Anesthesiology
NPI 1104093848
UNIVERSITY OF COLORADO SCHOOL OF MEDICINE 4200 E. 9TH AVE
Denver, CO 80262
(303) 315-7424
✔ PECOS✔ Accepts Medicare0.2 mi
Jessica Vanderkwaak, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1154792638
1400 JACKSON ST
Denver, CO 80206
(303) 388-4461
✔ PECOS✔ Accepts Medicare0.7 mi
Thomas Trouillot, M.D.
Gastroenterology
NPI 1902850811
1960 OGDEN ST SUITE 220
Denver, CO 80218
(303) 861-0808
✔ PECOS✔ Accepts Medicare2.4 mi
Andrea Grilli, MD
Anesthesiology
NPI 1003893298
455 SHERMAN SUITE 510
Denver, CO 80203
(303) 377-6825
✔ PECOS✔ Accepts Medicare2.8 mi
Katharine Sutton, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1720819378
777 BANNOCK ST
Denver, CO 80204
(303) 436-4949
✔ Accepts Medicare3.0 mi
Annabelle Flanagan, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1467811349
12605 E 16TH AVE
Aurora, CO 80045
(720) 848-0000
✔ PECOS5.0 mi
Melissa Irwin, C.R.N.A.
Certified Registered Nurse Anesthetist (CRNA)
NPI 1467748376
12605 E 16TH AVE UNIVERSITY OF COLORADO HOSPITAL
Aurora, CO 80045
(720) 848-0000
✔ PECOS✔ Accepts Medicare5.0 mi
Noelia Rodriguez, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1770752404
12605 E 16TH AVE
Aurora, CO 80045
(720) 848-0000
✔ PECOS✔ Accepts Medicare5.0 mi
Raleigh Anderson, M.D.
Anesthesiology
NPI 1821451543
13001 E 17TH PL UNIVERSITY OF COLORADO SCHOOL OF MEDICINE GME
Aurora, CO 80045
(303) 724-1784
✔ PECOS✔ Accepts Medicare5.3 mi
Thanh Huynh, MD
Anesthesiology
NPI 1447235122
8300 W 38TH AVE
Wheat Ridge, CO 80033
(303) 422-9438
✔ PECOS✔ Accepts Medicare8.6 mi
James Sederberg, MD
Anesthesiology
NPI 1487700159
8300 W 38TH AVE
Wheat Ridge, CO 80033
(303) 422-9438
✔ PECOS✔ Accepts Medicare8.7 mi
See all 37 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 Denver Digestive Health Specialists Inc's NPI number?

The NPI number for Denver Digestive Health Specialists Inc is 1447278981. It was assigned to this organization in the NPPES registry on July 17, 2006. The provider was formerly known as Drs Linkow Siegel.

Where is Denver Digestive Health Specialists Inc located?

Denver Digestive Health Specialists Inc is located at 4500 E 9th Ave Ste 720S, Denver, CO 80220. The listed phone number is (303) 355-3525.

What is Denver Digestive Health Specialists Inc's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Denver Digestive Health Specialists Inc enrolled in Medicare?

Yes. Denver Digestive Health Specialists Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Denver Digestive Health Specialists Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 37 clinicians in 5 Medicare specialties reassign their Medicare billing to Denver Digestive Health Specialists Inc. 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 Certified Registered Nurse Anesthetist (CRNA) (15), Anesthesiology (10) and Gastroenterology (7). Of these, 9 practice at this address and 21 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 Denver Digestive Health Specialists Inc was last updated on February 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.