MARY ELLEN R DREHER APRN, CRNA
NPI 1851518690
Nurse Anesthetist, Certified Registered in Rochester, MN

Q: What is Mary Ellen Dreher's NPI number?

The NPI number for Mary Ellen Dreher is 1851518690. It was assigned to this individual provider in the NPPES registry on April 20, 2007.

Q: What is Mary Ellen Dreher's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Mary Ellen Dreher was last updated on August 20, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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 April 20, 2007PECOS EnrolledAccepts Medicare Assignment

1650 4TH ST SE, ROCHESTER, MN 55904(507) 529-6600 Get Directions Write a Review

NPPES record last updated: August 20, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Aug 20, 2024, Jul 22, 2020, Sep 12, 2018 (3 updates tracked since 2018).

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About Mary Ellen R Dreher Aprn, Crna NPPES

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

MARY ELLEN R DREHER APRN, CRNA (NPI 1851518690) is an individual nurse anesthetist, certified registered in Rochester, Minnesota, licensed in Minnesota (39) and active in the NPI registry since April 2007. She is enrolled in Medicare PECOS, is affiliated with Olmsted Medical Center, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1851518690

Entity TypeIndividualFemale

Primary Taxonomy367500000X

Provider Legal NameMARY ELLEN R DREHERCredential: APRN, CRNA

Location Address1650 4TH ST SERochester, MN 55904-4717

Mailing Address1650 4th St SeRochester, MN 55904-4717 · (507) 529-6600

Phone(507) 529-6600

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateApril 20, 2007

Last NPPES UpdateAugust 20, 20243 updates tracked since enumeration

NPPES CertifiedAugust 20, 2024

✔ NPI 1851518690 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 MN · 39

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.

1650 4TH ST SE, Rochester, MN 55904

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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

Mary Ellen R Dreher Aprn, Crna 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 ID6406953926

PECOS Enrollment IDI20070517000573

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 Mary Ellen Dreher reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Olmsted Medical Center

Same address

General Acute Care Hospital

1650 4TH ST SE
Rochester, MN 55904

Reassigned Medicare billing, Minnesota enrollment
379 clinicians in this Medicare group

NPI 1538112131 (507) 288-3443

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

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Olmsted Medical Center

Acute Care Hospitals · Rochester, MN

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number240006

Location1650 Fourth Street SoutheastRochester, MN 55904 · Olmsted County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 55904 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

$127.61 typical visit price

range $56.00 – $168.28

Typical copayment $31.90 (range $14.00 – $42.07)

Most-billed visit code 99204

Established Patient

$69.74 typical visit price

range $18.32 – $138.04

Typical copayment $17.43 (range $4.58 – $34.51)

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.

GURUPRASAD RANGANATHA RAO KAGINELE MD

Emergency Medicine