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

CLAIRE JOANNA HARTUNG MD
NPI 1336679661
Family Medicine in Watsonville, CA

Q: What is Claire Hartung's NPI number?

The NPI number for Claire Hartung is 1336679661. It was assigned to this individual provider in the NPPES registry on June 19, 2017.

Q: What is Claire Hartung's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Claire Hartung was last updated on October 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 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.

Active since June 19, 2017PECOS EnrolledAccepts Medicare Assignment

45 NIELSON ST, WATSONVILLE, CA 95076(831) 728-0222 Get Directions Write a Review

NPPES record last updated: October 2, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 2, 2026, Jul 19, 2023, Feb 11, 2022 and 2 more (5 updates tracked since 2017).

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About Claire Joanna Hartung Md NPPES

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

CLAIRE JOANNA HARTUNG MD (NPI 1336679661) is an individual family medicine provider in Watsonville, California, licensed in California (A157215) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Rochester School Of Medicine And Dentistry (2017).

NPPES Registry Identity

NPI1336679661

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameCLAIRE JOANNA HARTUNGCredential: MD

Location Address45 NIELSON STWatsonville, CA 95076-2468

Mailing Address45 Nielson StWatsonville, CA 95076-2468 · (831) 728-0222

Phone(831) 728-0222

Sole ProprietorNo

Medical School CMSUniversity Of Rochester School Of Medicine And DentistryGraduated 2017

Enumeration DateJune 19, 2017

Last NPPES UpdateOctober 2, 20265 updates tracked since enumeration

NPPES CertifiedOctober 2, 2026

✔ NPI 1336679661 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · A157215

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.

Also ListedHospitalistTaxonomy 208M00000X · License A157215 (CA)

45 NIELSON ST, Watsonville, CA 95076

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Secondary Practice Locations 2

Location 1911 Sunset DrHollister, CA 95023-5602 · Phone (831) 637-5711

Location 21441 Constitution BlvdSalinas, CA 93906-3195 · Phone (831) 755-4111

Other Identifiers 1

OtherA157215CA · State Medical License

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

Claire Joanna Hartung 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 ID4880019819

PECOS Enrollment IDI20211129001361

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 Claire Hartung reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Salud Para La Gente

0.1 mi

Federally Qualified Health Center (FQHC)

45 NIELSON STREET
Watsonville, CA 95076

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

NPI 1629269618 (831) 761-1588

County Of Monterey

11 mi

Family Medicine

17615 MORO RD
Prunedale, CA 93907

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

NPI 1063151363 (831) 663-3926

Hazel Hawkins Memorial Hospital

23 mi

General Acute Care Hospital

911 SUNSET DR
Hollister, CA 95023

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

NPI 1275578817 (831) 637-5711

Hospitalist Medicine Physicians Of California, Inc

303 mi

Internal Medicine

18300 US HIGHWAY 18
Apple Valley, CA 92307

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

NPI 1184663965 (760) 946-4233

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 4

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.

93 services63 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.

54 services36 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

53 services53 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.

21 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95076 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

$96.03 typical visit price

range $62.97 – $186.69

Typical copayment $24.00 (range $15.74 – $46.67)

Most-billed visit code 99203

Established Patient

$109.72 typical visit price

range $21.02 – $153.16

Typical copayment $27.43 (range $5.25 – $38.29)

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 11

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

MARITZA CARDENAS FNP

Nurse Practitioner (Family)