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DR. MARISSA ANNE O'KEEFFE MD
NPI 1689133597
Internal Medicine - Nephrology in Brooklyn Center, MN

Active since March 19, 2019PECOS EnrolledAccepts Medicare Assignment
6200 SHINGLE CREEK PKWY STE 250, BROOKLYN CENTER, MN 55430(763) 544-0696 Get Directions Write a Review

NPPES record last updated: August 14, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 14, 2024, Dec 3, 2022, Mar 19, 2019 (3 updates tracked since 2019).

About Dr. Marissa Anne O'keeffe Md NPPES

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

DR. MARISSA ANNE O'KEEFFE MD (NPI 1689133597) is an individual nephrology provider in Brooklyn Center, Minnesota, licensed in Minnesota (75552) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS, is affiliated with Allina United Hospital, and maintains a secondary practice location in Aurora.

NPPES Registry Identity

NPI1689133597
Entity TypeIndividualFemale
Primary Taxonomy207RN0300X
Provider Legal NameDR. MARISSA ANNE O'KEEFFECredential: MD
Location Address6200 SHINGLE CREEK PKWY STE 250Brooklyn Center, MN 55430-2107
Mailing Address12700 E 19th AveAurora, CO 80045-2560 · (303) 724-4852
Phone(763) 544-0696
Sole ProprietorNo
Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 2019
Enumeration DateMarch 19, 2019
Last NPPES UpdateAugust 14, 20243 updates tracked since enumeration
NPPES CertifiedAugust 14, 2024
✔ NPI 1689133597 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in MN · 75552
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
6200 SHINGLE CREEK PKWY STE 250, Brooklyn Center, MN 55430
Open in Google Maps ↗

Other Names 1

Former Name (1)Dr. Marissa Anne Martin Md

Secondary Practice Location 1

Location 113001 E 17th PlAurora, CO 80045-2570 · Phone (303) 724-1792

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HealthPartners.Insurance ›

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

Dr. Marissa Anne O'keeffe Md 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 ID3072847706
PECOS Enrollment IDI20240508002286, I20250626003627
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

3

Medicare enrollment records show Marissa O'keeffe reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Kidney Specialists Of Minnesota, PA
Same address
Nephrology
6200 SHINGLE CREEK PKWY, SUITE 260
Brooklyn Center, MN 55430
  • Reassigned Medicare billing, Minnesota and Wisconsin enrollments
  • 33 clinicians in this Medicare group
NPI 1629010228 (763) 561-5349
Allina Health System
3.6 mi
Addiction (Substance Use Disorder)
520 OSBORNE RD NE, STE 120
Fridley, MN 55432
  • Reassigned Medicare billing, Minnesota enrollment
  • 3,733 clinicians in this Medicare group
NPI 1083197214 (763) 236-4300
North Memorial Health Care
3.7 mi
Surgery
3300 OAKDALE AVE N
Robbinsdale, MN 55422
  • Reassigned Medicare billing, Minnesota enrollment
  • 540 clinicians in this Medicare group
NPI 1629352489 (763) 520-5200

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 5

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
227 services128 patients
Hemodialysis procedure with physician evaluation 90935
Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
59 services30 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
55 services53 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.
24 services15 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
16 services16 patients

Hospital Affiliations CMS Care Compare 5

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

Allina United Hospital

Acute Care Hospitals · Saint Paul, MN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240038
Location333 North Smith AvenueSaint Paul, MN 55102 · Ramsey County
Emergency services Birthing friendly

Abbott Northwestern Hospital

Acute Care Hospitals · Minneapolis, MN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240057
Location800 East 28th StreetMinneapolis, MN 55407 · Hennepin County
Emergency services Birthing friendly

M Health Fairview University Of Mn

Acute Care Hospitals · Minneapolis, MN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240080
Location2450 Riverside AvenueMinneapolis, MN 55454 · Hennepin County
Emergency services Birthing friendly

Mercy Hospital

Acute Care Hospitals · Coon Rapids, MN
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240115
Location4050 Coon Rapids BlvdCoon Rapids, MN 55433 · Anoka County
Emergency services Birthing friendly

M Health Fairview St John's Hospital

Acute Care Hospitals · Maplewood, MN
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number240210
Location1575 Beam AvenueMaplewood, MN 55109 · Ramsey County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 55430 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
$98.61 typical visit price
range $18.32 – $138.04
Typical copayment $24.65 (range $4.58 – $34.51)
Most-billed visit code 99214
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 5

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

BRADY ALEXANDER BRABEC
Internal Medicine (Nephrology)
6200 SHINGLE CREEK PKWY STE 250
BROOKLYN CENTER, MN 55430
Hennepin County (763) 544-0696
MAYLY THOR RD, LD
Dietitian, Registered
6200 SHINGLE CREEK PKWY STE 250
BROOKLYN CENTER, MN 55430
Hennepin County (763) 299-6431
MAXWELL DAVID LEITHER
Internal Medicine (Nephrology)
6200 SHINGLE CREEK PKWY STE 250
BROOKLYN CENTER, MN 55430
Hennepin County (763) 561-5349
DIANE MARIE PERRY LICSW
Social Worker (Clinical)
6200 SHINGLE CREEK PKWY STE 250
BROOKLYN CENTER, MN 55430
Hennepin County (612) 578-3976
ANNA E KRIEGER MD
Internal Medicine (Nephrology)
6200 SHINGLE CREEK PKWY STE 250
BROOKLYN CENTER, MN 55430
Hennepin County (763) 544-0696

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 O'keeffe's NPI number?

The NPI number for Marissa O'keeffe is 1689133597. It was assigned to this individual provider in the NPPES registry on March 19, 2019. The provider is also known as Dr. Marissa Anne Martin MD.

Where is Marissa O'keeffe located?

Marissa O'keeffe practices at 6200 Shingle Creek Pkwy Ste 250, Brooklyn Center, MN 55430. The listed phone number is (763) 544-0696.

What is Marissa O'keeffe's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Marissa O'keeffe enrolled in Medicare?

Yes. Marissa O'keeffe 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 Marissa O'keeffe's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa O'keeffe reassigns Medicare benefits to 3 organizations: Kidney Specialists Of Minnesota, PA (Brooklyn Center, MN), Allina Health System (Fridley, MN) and North Memorial Health Care (Robbinsdale, MN). 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 O'keeffe's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marissa O'keeffe accept?

Health plans from HealthPartners list Marissa O'keeffe 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.

Is Marissa O'keeffe affiliated with any hospitals?

According to CMS data, Marissa O'keeffe is affiliated with Allina United Hospital, Abbott Northwestern Hospital, M Health Fairview University Of Mn, Mercy Hospital and M Health Fairview St John's Hospital.

When was this NPI record last updated?

The NPPES record for Marissa O'keeffe was last updated on August 14, 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.