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DR. JONATHAN S. GALLEN M.D.
NPI 1023123957
Anesthesiology in Denver, CO

Active since August 20, 2006PECOS Enrolled
3118 NEWTON ST, DENVER, CO 80211(720) 923-6165 Get Directions Write a Review

NPPES record last updated: February 27, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 27, 2023, Aug 19, 2021, Jun 29, 2021 and 3 more (6 updates tracked since 2017).

About Dr. Jonathan S. Gallen M.d. NPPES

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

DR. JONATHAN S. GALLEN M.D. (NPI 1023123957) is an individual anesthesiology provider in Denver, Colorado, licensed in Colorado (48208) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1023123957
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. JONATHAN S. GALLENCredential: M.D.
Location Address3118 NEWTON STDenver, CO 80211-3644
Mailing Address1075 S Monroe StDenver, CO 80209-4941 · (858) 444-5781
Phone(720) 923-6165
Sole ProprietorNo
Enumeration DateAugust 20, 2006
Last NPPES UpdateFebruary 27, 20236 updates tracked since enumeration
NPPES CertifiedFebruary 27, 2023
✔ NPI 1023123957 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CO · 48208
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedPhysical Medicine & RehabilitationTaxonomy 208100000X · License 48208 (CO)
3118 NEWTON ST, Denver, CO 80211
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Secondary Practice Locations 4

Location 11712 W Uintah StColorado Springs, CO 80904-2958 · Phone (719) 445-6077 · Fax (719) 445-6077
Location 28000 E MAPLEWOOD AVE, STE 200GREENWOOD VILLAGE, CO 80111-4727 · Phone (303) 438-3999 · Fax (720) 439-9500
Location 31400 Jackson StDenver, CO 80206-2761 · Phone (303) 388-4461 · Fax (303) 398-1211
Location 410350 E Dakota AveDenver, CO 80247-1314 · Phone (303) 338-4545

Other Identifiers 1

Medicaid21921385CO

Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Jonathan S. Gallen M.d. 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 Reassignment

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

Prime Anesthesia PLLC
29 mi
Anesthesiology
220 S WILCOX ST # 56
Castle Rock, CO 80104
  • Reassigned Medicare billing, Colorado enrollment
  • 28 clinicians in this Medicare group
NPI 1427685247 (720) 845-0007

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

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.

SARAH AL-NAJAR MD
Anesthesiology
3118 NEWTON ST
DENVER, CO 80211
Denver County (720) 845-0007
IAN WILLIAM STONE DO
Anesthesiology
3118 NEWTON ST
DENVER, CO 80211
Denver County (720) 845-0007

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 Jonathan Gallen's NPI number?

The NPI number for Jonathan Gallen is 1023123957. It was assigned to this individual provider in the NPPES registry on August 20, 2006.

Where is Jonathan Gallen located?

Jonathan Gallen practices at 3118 Newton St, Denver, CO 80211. The listed phone number is (720) 923-6165.

What is Jonathan Gallen's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Jonathan Gallen enrolled in Medicare?

Yes. Jonathan Gallen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Jonathan Gallen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jonathan Gallen reassigns Medicare benefits to Prime Anesthesia PLLC (Castle Rock, 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 Jonathan Gallen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jonathan Gallen accept?

Health plans from Oscar Health and Oscar Insurance Company list Jonathan Gallen 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 Jonathan Gallen was last updated on February 27, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.