1. Home
  2. Directory
  3. California
  4. Sonora
  5. Nurse Anesthetist Certified Registered
  6. NPI Profile

MS. KAREN MAUREEN BLUM CRNA
NPI 1275689853
Nurse Anesthetist, Certified Registered in Sonora, CA

Active since January 26, 2007PECOS Enrolled
1000 GREENLEY RD, SONORA, CA 95370(209) 536-5000(209) 536-3514 Get Directions Write a Review

NPPES record last updated: July 18, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Ms. Karen Maureen Blum Crna NPPES

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

MS. KAREN MAUREEN BLUM CRNA (NPI 1275689853) is an individual nurse anesthetist, certified registered in Sonora, California, licensed in California (95000712) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1275689853
Entity TypeIndividualFemale
Primary Taxonomy367500000X
Provider Legal NameMS. KAREN MAUREEN BLUMCredential: CRNA
Location Address1000 GREENLEY RDSonora, CA 95370-5200
Mailing AddressPo Drawer PhChinle, AZ 86503 · (928) 674-7001 · Fax (928) 674-7705
Phone(209) 536-5000
Fax(209) 536-3514
Sole ProprietorNo
Enumeration DateJanuary 26, 2007
Last NPPES UpdateJuly 18, 2022
NPPES CertifiedJuly 18, 2022
✔ NPI 1275689853 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in CA · 95000712
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.
1000 GREENLEY RD, Sonora, CA 95370
Open in Google Maps ↗

Other Names 1

Former Name (1)Ms. Karen Maureen O'reilly Crna

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Karen Maureen Blum 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

5

Medicare enrollment records show Karen Blum reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sonora Anesthesia Services A Medical Group Inc
Same address
Anesthesiology
1000 GREENLEY RD
Sonora, CA 95370
  • Reassigned Medicare billing, California enrollment
  • 31 clinicians in this Medicare group
NPI 1265481105 (209) 536-3514
St. Joseph Health Northern California, LLC
108 mi
General Acute Care Hospital
1000 TRANCAS ST
Napa, CA 94558
  • Reassigned Medicare billing, California enrollment
  • 32 clinicians in this Medicare group
NPI 1235218785 (707) 252-4411
Amsurg San Luis Obispo Anesthesia, LLC
186 mi
Anesthesiology
77 CASA ST, SUITE 106
San Luis Obispo, CA 93405
  • Reassigned Medicare billing, California enrollment
  • 19 clinicians in this Medicare group
NPI 1164749842 (805) 541-1021
Redding Anesthesia Associates LP
209 mi
Nurse Anesthetist, Certified Registered
1825 SONOMA ST
Redding, CA 96001
  • Reassigned Medicare billing, California enrollment
  • 20 clinicians in this Medicare group
NPI 1386001139 (530) 246-7000
North American Partners In Anesthesia New Hampshire LLP
2,566 mi
Anesthesiology
8 PROSPECT ST
Nashua, NH 03060
  • Reassigned Medicare billing, New Hampshire enrollment
  • 132 clinicians in this Medicare group
NPI 1306838701 (603) 577-2000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95370 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
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$73.16 typical visit price
range $19.28 – $144.60
Typical copayment $18.29 (range $4.82 – $36.15)
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 20

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

WYATT STEBBINS PA-C
Physician Assistant
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 532-1326
CATHERINE YOUNGEUN LEE
Hospitalist
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 536-5000
MARY GAIL ALLARD PHARMD
Pharmacist
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 536-3692
DR. KEVIN GANDHI DO
Internal Medicine
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 536-5000
LEVI ROBERTSON
Registered Nurse
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 536-5000
JIANDONG WEI MD
Internal Medicine
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 536-5000
BRITTNEY SCOTT
Registered Nurse
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (562) 485-8246
MR. WILLIAM PATTY RNFA
General Acute Care Hospital
1000 GREENLEY RD
SONORA, CA 95370
Tuolumne County (209) 536-5000

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 Karen Blum's NPI number?

The NPI number for Karen Blum is 1275689853. It was assigned to this individual provider in the NPPES registry on January 26, 2007. The provider is also known as Ms. Karen Maureen O'reilly Crna.

Where is Karen Blum located?

Karen Blum practices at 1000 Greenley Rd, Sonora, CA 95370. The listed phone number is (209) 536-5000.

What is Karen Blum's specialty?

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

Is Karen Blum enrolled in Medicare?

Yes. Karen Blum is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Karen Blum's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Blum reassigns Medicare benefits to 5 organizations: Sonora Anesthesia Services A Medical Group Inc (Sonora, CA), St. Joseph Health Northern California, LLC (Napa, CA), Amsurg San Luis Obispo Anesthesia, LLC (San Luis Obispo, CA), Redding Anesthesia Associates LP (Redding, CA) and North American Partners In Anesthesia New Hampshire LLP (Nashua, NH). 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 Karen Blum'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 Karen Blum was last updated on July 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.