1. Home
  2. Directory
  3. Colorado
  4. Denver
  5. Nurse Anesthetist Certified Registered
  6. NPI Profile

THOMAS G SIROKMAN CRNA
NPI 1164478236
Nurse Anesthetist, Certified Registered in Denver, CO

Active since May 26, 2006PECOS Enrolled
4600 S SYRACUSE ST, STE 932, DENVER, CO 80237(303) 256-6467 Get Directions Write a Review

NPPES record last updated: October 12, 2009. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Thomas G Sirokman Crna NPPES

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

THOMAS G SIROKMAN CRNA (NPI 1164478236) is an individual nurse anesthetist, certified registered in Denver, Colorado, licensed in Colorado (60923) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1164478236
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameTHOMAS G SIROKMANCredential: CRNA
Location Address4600 S SYRACUSE ST, STE 932Denver, CO 80237-2750
Mailing Address1922 S Xenia CtDenver, CO 80231-3331 · (303) 752-4541 · Fax (303) 752-1588
Phone(303) 256-6467
Sole ProprietorNo
Enumeration DateMay 26, 2006
Last NPPES UpdateOctober 12, 2009
✔ NPI 1164478236 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in CO · 60923
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
Also ListedRegistered NurseTaxonomy 163W00000X · License 60923 (CO)
4600 S SYRACUSE ST, Denver, CO 80237
Open in Google Maps ↗

Other Identifiers 2

Medicaid66980062CO
Medicare PINCO305847CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Thomas G Sirokman Crna is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

2

Medicare enrollment records show Thomas Sirokman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Arapahoe Gastroenterology Anesthesia Associates LLC
6.9 mi
Nurse Anesthetist, Certified Registered
1001 SOUTHPARK DR
Littleton, CO 80120
  • Reassigned Medicare billing, Colorado enrollment
  • 84 clinicians in this Medicare group
NPI 1598115479 (888) 337-3509
Anesthesia Dynamics LLC
1,529 mi
Anesthesiology
206 2ND ST E
Bradenton, FL 34208
  • Reassigned Medicare billing, Colorado enrollment
  • 87 clinicians in this Medicare group
NPI 1073001012 (888) 851-4642

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Anesthesia for exam of colon using an endoscope 00812
Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.
24 services24 patients
Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
16 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80237 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 2

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

CO FIDELIS PC
Physical Medicine & Rehabilitation
4600 S SYRACUSE ST, 9TH FLOOR
DENVER, CO 80237
Denver County (303) 223-4949
METRO DIAGNOSTICS & ANESTHESIA
Nurse Anesthetist, Certified Registered
4600 S SYRACUSE ST, STE 932
DENVER, CO 80237
Denver County (303) 256-6467

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 Thomas Sirokman's NPI number?

The NPI number for Thomas Sirokman is 1164478236. It was assigned to this individual provider in the NPPES registry on May 26, 2006.

Where is Thomas Sirokman located?

Thomas Sirokman practices at 4600 S Syracuse St Ste 932, Denver, CO 80237. The listed phone number is (303) 256-6467.

What is Thomas Sirokman's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Thomas Sirokman enrolled in Medicare?

Yes. Thomas Sirokman is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Thomas Sirokman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Sirokman reassigns Medicare benefits to 2 organizations: Arapahoe Gastroenterology Anesthesia Associates LLC (Littleton, CO) and Anesthesia Dynamics LLC (Bradenton, FL). 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 Thomas Sirokman'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 Thomas Sirokman was last updated on October 12, 2009. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.