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MARISSA LEE FAHRBACH
NPI 1427430032
Nurse Anesthetist, Certified Registered in Boulder, CO

Active since June 19, 2015PECOS Enrolled
1755 48TH ST STE 100, BOULDER, CO 80301(303) 604-5000(720) 890-0364 Get Directions Write a Review

NPPES record last updated: March 5, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 5, 2020, Aug 8, 2016 (2 updates tracked since 2016).

About Marissa Lee Fahrbach NPPES

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

MARISSA LEE FAHRBACH (NPI 1427430032) is an individual nurse anesthetist, certified registered in Boulder, Colorado, licensed in Colorado (0994226) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427430032
Entity TypeIndividualFemale
Primary Taxonomy367500000X
Provider Legal NameMARISSA LEE FAHRBACH
Location Address1755 48TH ST STE 100Boulder, CO 80301-2712
Mailing Address382 S Arthur AveLouisville, CO 80027-3094 · (303) 604-5000 · Fax (720) 890-0364
Phone(303) 604-5000
Fax(720) 890-0364
Sole ProprietorYes
Enumeration DateJune 19, 2015
Last NPPES UpdateMarch 5, 20202 updates tracked since enumeration
NPPES CertifiedMarch 5, 2020
✔ NPI 1427430032 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
Licenses✔ Licensed in CO · 0994226✔ Licensed in KS · 557356
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 103068 (KS)
1755 48TH ST STE 100, Boulder, CO 80301
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Other Names 1

Former Name (1)Marisssa Lee Benson

Other Identifiers 1

Medicaid9000171761CO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, Oscar Insurance Company, Select Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marissa Lee Fahrbach 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 Marissa Fahrbach reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Boulder Valley Gastroenterology Inc.
Same address
Gastroenterology
1755 48TH ST STE 100
Boulder, CO 80301
  • Reassigned Medicare billing, Colorado enrollment
  • 57 clinicians in this Medicare group
NPI 1720674955 (303) 604-5000
North Denver Anesthesia Associates, LLC
Same address
Nurse Anesthetist, Certified Registered
1755 48TH ST STE 110
Boulder, CO 80301
  • Reassigned Medicare billing, Colorado enrollment
  • 30 clinicians in this Medicare group
NPI 1902624422 (303) 604-5000

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 4

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 other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
125 services125 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.
32 services32 patients
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.
27 services27 patients
Anesthesia for procedure on small and large bowel using an endoscope 00813
Anesthesia for an endoscopic procedure on the small and large bowel ensures comfort and relaxation during the procedure. It involves administering medicine to help you sleep or feel drowsy. This allows the doctor to examine your bowels without causing you discomfort or pain.
26 services26 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80301 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 7

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

MS. JANICE ANDREA MONTOYA PA C
Physician Assistant (Medical)
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (720) 932-7714
MS. VICTORIA M EVELYN PA
Physician Assistant (Medical)
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
BRITTANY PROPOGGIO PA-C
Physician Assistant
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
DR. JOEL R MONTBRIAND M.D., F.A.C.P.
Internal Medicine (Gastroenterology)
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
RICHARD H. MOSELEY M.D.
Internal Medicine (Gastroenterology)
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
BOULDER VALLEY GASTROENTEROLOGY INC.
Internal Medicine (Gastroenterology)
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (303) 604-5000
DR. KELLY ZUCKER D.O
Internal Medicine (Gastroenterology)
1755 48TH ST STE 100
BOULDER, CO 80301
Boulder County (303) 604-5000

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 Marissa Fahrbach's NPI number?

The NPI number for Marissa Fahrbach is 1427430032. It was assigned to this individual provider in the NPPES registry on June 19, 2015. The provider is also known as Marisssa Lee Benson.

Where is Marissa Fahrbach located?

Marissa Fahrbach practices at 1755 48th St Ste 100, Boulder, CO 80301. The listed phone number is (303) 604-5000.

What is Marissa Fahrbach's specialty?

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

Is Marissa Fahrbach enrolled in Medicare?

Yes. Marissa Fahrbach is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marissa Fahrbach's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Fahrbach reassigns Medicare benefits to 2 organizations: Boulder Valley Gastroenterology Inc. (Boulder, CO) and North Denver Anesthesia Associates, LLC (Boulder, CO). 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 Marissa Fahrbach's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marissa Fahrbach accept?

Health plans from Oscar Health, Oscar Insurance Company and Select Health list Marissa Fahrbach 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 Marissa Fahrbach was last updated on March 5, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.