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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

IRIS REBECCA LOWENBERG-LIN FNP
NPI 1952661985
Nurse Practitioner - Family in San Rafael, CA

Active since May 24, 2012PECOS Enrolled
800 A ST, SAN RAFAEL, CA 94901(415) 457-8182(415) 457-7471 Get Directions Write a Review

NPPES record last updated: September 10, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 10, 2026, Aug 21, 2023, Jul 21, 2022 and 1 more (4 updates tracked since 2017).

About Iris Rebecca Lowenberg-lin Fnp NPPES

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

IRIS REBECCA LOWENBERG-LIN FNP (NPI 1952661985) is an individual family provider in San Rafael, California, licensed in California (21843) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).

NPPES Registry Identity

NPI1952661985
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameIRIS REBECCA LOWENBERG-LINCredential: FNP
Location Address800 A STSan Rafael, CA 94901-3011
Mailing AddressPo Box 3517San Rafael, CA 94912-3517 · (415) 457-8182 · Fax (415) 457-7471
Phone(415) 457-8182
Fax(415) 457-7471
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateMay 24, 2012
Last NPPES UpdateSeptember 10, 20264 updates tracked since enumeration
NPPES CertifiedSeptember 10, 2026
✔ NPI 1952661985 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in CA · 21843
800 A ST, San Rafael, CA 94901
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Iris Rebecca Lowenberg-lin Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID9133379845
PECOS Enrollment IDI20121015000437
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

2

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

One Medical Group, Inc.
14 mi
Family Medicine
2 EMBARCADERO CTR LBBY LEVEL
San Francisco, CA 94111
  • Reassigned Medicare billing, California enrollment
  • 291 clinicians in this Medicare group
NPI 1467781641 (415) 578-3100
Henry J Low Medical Corporation
27 mi
Internal Medicine
1828 EL CAMINO REAL, SUITE 706
Burlingame, CA 94010
  • Reassigned Medicare billing, California enrollment
  • 4 clinicians in this Medicare group
NPI 1073841557 (650) 777-9117

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 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.
45 services41 patients
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.
38 services37 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.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94901 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.

Other Providers at the Same Location NPPES 14

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

ALYSSA AMBER LAKE
Counselor (Addiction (Substance Use Disorder))
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 847-8733
SHANNALEAH SHAHEDI MASTERS
Physician Assistant
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182
OLIVIA HORAN AGPCNP-C
Nurse Practitioner
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182
KELLY MCKOIN PA-C
Physician Assistant
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182
AGUSTINA DEL CARRIL
Social Worker (Clinical)
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182
RITTER CENTER
Clinic/Center (Federally Qualified Health Center (FQHC))
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182
MR. MICHAEL A BEYER LCSW
Social Worker (Clinical)
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182
PATRICK LIANG PMHNP
Nurse Practitioner (Psychiatric/Mental Health)
800 A ST
SAN RAFAEL, CA 94901
Marin County (415) 457-8182

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 Iris Lowenberg-lin's NPI number?

The NPI number for Iris Lowenberg-lin is 1952661985. It was assigned to this individual provider in the NPPES registry on May 24, 2012.

Where is Iris Lowenberg-lin located?

Iris Lowenberg-lin practices at 800 A St, San Rafael, CA 94901. The listed phone number is (415) 457-8182.

What is Iris Lowenberg-lin's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Iris Lowenberg-lin enrolled in Medicare?

Yes. Iris Lowenberg-lin is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Iris Lowenberg-lin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Iris Lowenberg-lin reassigns Medicare benefits to 2 organizations: One Medical Group, Inc. (San Francisco, CA) and Henry J Low Medical Corporation (Burlingame, 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 Iris Lowenberg-lin'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 Iris Lowenberg-lin was last updated on September 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 54 days 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.