OGNJEN KATAN M.D.
NPI 1275875668
Anesthesiology in Santa Rosa, CA

Q: What is Ognjen Katan's NPI number?

The NPI number for Ognjen Katan is 1275875668. It was assigned to this individual provider in the NPPES registry on March 23, 2013.

Q: What is Ognjen Katan's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Ognjen Katan was last updated on March 28, 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.

Active since March 23, 2013PECOS EnrolledAccepts Medicare Assignment

1165 MONTGOMERY DR, SANTA ROSA, CA 95405(707) 547-4608(707) 547-4609 Get Directions Write a Review

NPPES record last updated: March 28, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 28, 2023, Mar 29, 2018, Feb 1, 2017 (3 updates tracked since 2017).

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About Ognjen Katan M.d. NPPES

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

OGNJEN KATAN M.D. (NPI 1275875668) is an individual anesthesiology provider in Santa Rosa, California, licensed in Illinois (125062663) and active in the NPI registry since March 2013. He is enrolled in Medicare PECOS, maintains a secondary practice location in Santa Rosa, and is a graduate of Other (2013).

NPPES Registry Identity

NPI1275875668

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameOGNJEN KATANCredential: M.D.

Location Address1165 MONTGOMERY DRSanta Rosa, CA 95405-4801

Mailing Address201 E Huron St. #105Chicago, IL 60611-4494 · (312) 926-2000

Phone(707) 547-4608

Fax(707) 547-4609

Sole ProprietorNo

Medical School CMSOtherGraduated 2013

Enumeration DateMarch 23, 2013

Last NPPES UpdateMarch 28, 20233 updates tracked since enumeration

NPPES CertifiedMarch 28, 2023

✔ NPI 1275875668 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in IL · 125062663

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 ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License A153761 (CA)

1165 MONTGOMERY DR, Santa Rosa, CA 95405

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Secondary Practice Location 1

Location 11165 Montgomery DrSanta Rosa, CA 95405-4801 · Phone (707) 547-4608 · Fax (707) 547-4609

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Ognjen Katan M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9335422914

PECOS Enrollment IDI20180620003238

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

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

Providence Medical Foundation

0.2 mi

Internal Medicine

500 DOYLE PARK DR, SUITE 303
Santa Rosa, CA 95405

Reassigned Medicare billing, California enrollment
1,699 clinicians in this Medicare group

NPI 1740584473 (707) 303-8300

Anesthesia & Analgesia Medical Group, Inc.

0.9 mi

Anesthesiology

2455 BENNETT VALLEY RD STE C219
Santa Rosa, CA 95404

Reassigned Medicare billing, California enrollment
140 clinicians in this Medicare group

NPI 1659320984 (707) 522-1800

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.

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

195 services106 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

53 services39 patients

Critical care, each additional 30 minutes 99292

Critical care refers to special attention given to patients facing life-threatening conditions. Each additional 30 minutes indicates the extension of this specialized care. This might include close monitoring, medication adjustments, and immediate interventions as needed.

50 services37 patients

Emergent insertion of breathing tube into windpipe using an endoscope 31500

This is a procedure where a thin tube is inserted into your windpipe to aid in breathing. It's done in emergency situations, using an endoscope, a tool with a light and camera, to ensure correct placement.

11 services11 patients

Other Providers at the Same Location NPPES 20

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

DR. RIDGELY OLIVER MULLER M.D.

Emergency Medicine

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5207

MRS. SONOE M OFT OTR/L

Occupational Therapist (Physical Rehabilitation)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5300

BETHANY HOFFMAN

Registered Nurse (Medical-Surgical)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5300

KATE ESTHER BLACK MD

Anesthesiology (Pain Medicine)

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

SAAD SULTAN PHARMD

Pharmacist

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 525-5380

CHASE DENNIS EMERGENCY MEDICAL GROUP INC

Emergency Medicine

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (925) 924-1600

JAMES JOHN MC KEITH M.D.

Emergency Medicine

1165 MONTGOMERY DR, SANTA ROSA MEMORIAL HOSPITAL
SANTA ROSA, CA 95405

Sonoma County (707) 525-5207

MATTHEW BRADY THOMAS M.D.

Emergency Medicine

1165 MONTGOMERY DR
SANTA ROSA, CA 95405

Sonoma County (707) 546-3210

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 Ognjen Katan's NPI number?

The NPI number for Ognjen Katan is 1275875668. It was assigned to this individual provider in the NPPES registry on March 23, 2013.

Where is Ognjen Katan located?

Ognjen Katan practices at 1165 Montgomery Dr, Santa Rosa, CA 95405. The listed phone number is (707) 547-4608.

What is Ognjen Katan's specialty?

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

Is Ognjen Katan enrolled in Medicare?

Yes. Ognjen Katan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Ognjen Katan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ognjen Katan reassigns Medicare benefits to 2 organizations: Providence Medical Foundation (Santa Rosa, CA) and Anesthesia & Analgesia Medical Group, Inc. (Santa Rosa, CA). 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 Ognjen Katan'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 Ognjen Katan was last updated on March 28, 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.