DR. MARISSA CASTRO FERNANDEZ KIEMELE MD
NPI 1144297516
Family Medicine in San Rafael, CA

Q: What is Marissa Fernandez Kiemele's NPI number?

The NPI number for Marissa Fernandez Kiemele is 1144297516. It was assigned to this individual provider in the NPPES registry on March 3, 2006. The provider is also known as Dr. Marissa Castro Fernandez MD.

Q: What is Marissa Fernandez Kiemele's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Active since March 03, 2006PECOS Enrolled

4000 CIVIC CENTER DR STE 200B, SAN RAFAEL, CA 94903(415) 492-3333(415) 492-3425 Get Directions Write a Review

NPPES record last updated: July 1, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 6, 2026, Jul 16, 2019, Jul 30, 2018 (3 updates tracked since 2018).

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About Dr. Marissa Castro Fernandez Kiemele Md NPPES

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

DR. MARISSA CASTRO FERNANDEZ KIEMELE MD (NPI 1144297516) is an individual family medicine provider in San Rafael, California, licensed in California (C192860) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Southcoast Hospitals Group, and is a graduate of Other (1995).

NPPES Registry Identity

NPI1144297516

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameDR. MARISSA CASTRO FERNANDEZ KIEMELECredential: MD

Location Address4000 CIVIC CENTER DR STE 200BSan Rafael, CA 94903-5232

Mailing Address4000 Civic Center Dr Ste 200bSan Rafael, CA 94903-5232 · (415) 492-3333 · Fax (415) 492-3425

Phone(415) 492-3333

Fax(415) 492-3425

Sole ProprietorNo

Medical School CMSOtherGraduated 1995

Enumeration DateMarch 3, 2006

Last NPPES UpdateJuly 1, 20263 updates tracked since enumeration

NPPES CertifiedJuly 1, 2026

✔ NPI 1144297516 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

Licenses✔ Licensed in CA · C192860✔ Licensed in MA · 292453✔ Licensed in NH · 18726

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

4000 CIVIC CENTER DR STE 200B, San Rafael, CA 94903

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Other Names 1

Former Name (1)Dr. Marissa Castro Fernandez Md

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marissa Castro Fernandez Kiemele Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID547212300

PECOS Enrollment IDI20260521000769

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 Marissa Fernandez Kiemele reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Regents Univ Of California Ucsf

17 mi

Internal Medicine

505 PARNASSUS AVE
San Francisco, CA 94143

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

NPI 1124439807 (415) 476-1000

Massachusetts General Physicians Organization Inc

2,699 mi

Dermatology

55 FRUIT ST, BUL 2
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,360 clinicians in this Medicare group

NPI 1801874573 (617) 724-0287

The General Hospital Corporation

2,699 mi

General Acute Care Hospital

55 FRUIT ST, BULFINCH 360
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,234 clinicians in this Medicare group

NPI 1023049236 (617) 726-2000

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 3

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

108 services98 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

29 services29 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

17 services17 patients

Hospital Affiliations CMS Care Compare

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

Southcoast Hospitals Group

Acute Care Hospitals · Fall River, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220074

Location363 Highland AvenueFall River, MA 02720 · Bristol County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94903 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

$104.67 typical visit price

range $69.07 – $202.63

Typical copayment $26.16 (range $17.26 – $50.65)

Most-billed visit code 99203

Established Patient

$119.61 typical visit price

range $23.44 – $166.64

Typical copayment $29.90 (range $5.86 – $41.66)

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.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

5 suppliers13 claims21 services$6.00 avg. paid by Medicare

Ostomy pouch, drainable, with barrier attached, with filter (1 piece), each A4424

DME-Orthotic Devices · category DF010N

2 suppliers12 claims240 services$3.82 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers17 claims17 services$57.15 avg. paid by Medicare

Portable oxygen concentrator, rental E1392

DME-Oxygen and Supplies · category DC002N

1 supplier11 claims11 services$30.31 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 3

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

MARIE JO GEHA MD

Internal Medicine

4000 CIVIC CENTER DR STE 200B
SAN RAFAEL, CA 94903

Marin County (415) 492-3333

DANIELLE BALESTRA PA

Physician Assistant

4000 CIVIC CENTER DR STE 200B
SAN RAFAEL, CA 94903

Marin County (415) 492-3333

MS. EKTA PATEL PA-C

Physician Assistant

4000 CIVIC CENTER DR STE 200B
SAN RAFAEL, CA 94903

Marin County (415) 492-3333

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 Fernandez Kiemele's NPI number?

The NPI number for Marissa Fernandez Kiemele is 1144297516. It was assigned to this individual provider in the NPPES registry on March 3, 2006. The provider is also known as Dr. Marissa Castro Fernandez MD.

Where is Marissa Fernandez Kiemele located?

Marissa Fernandez Kiemele practices at 4000 Civic Center Dr Ste 200B, San Rafael, CA 94903. The listed phone number is (415) 492-3333.

What is Marissa Fernandez Kiemele's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Marissa Fernandez Kiemele enrolled in Medicare?

Yes. Marissa Fernandez Kiemele is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marissa Fernandez Kiemele's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Fernandez Kiemele reassigns Medicare benefits to 3 organizations: Regents Univ Of California Ucsf (San Francisco, CA), Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, MA). 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 Fernandez Kiemele's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Marissa Fernandez Kiemele affiliated with any hospitals?

According to CMS data, Marissa Fernandez Kiemele is affiliated with Southcoast Hospitals Group.

When was this NPI record last updated?

The NPPES record for Marissa Fernandez Kiemele was last updated on July 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.