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DR. HALLEN PHAM MD
NPI 1811579667
Internal Medicine in Santa Clara, CA

Active since April 22, 2021PECOS EnrolledAccepts Medicare Assignment
710 LAWRENCE EXPY DEPT 272, SANTA CLARA, CA 95051(408) 554-9800 Get Directions Write a Review

NPPES record last updated: October 20, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 7, 2024, Apr 22, 2021 (2 updates tracked since 2021).

About Dr. Hallen Pham Md NPPES

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

DR. HALLEN PHAM MD (NPI 1811579667) is an individual internal medicine provider in Santa Clara, California, licensed in California (A197938) and active in the NPI registry since April 2021. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2021).

NPPES Registry Identity

NPI1811579667
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameDR. HALLEN PHAMCredential: MD
Location Address710 LAWRENCE EXPY DEPT 272Santa Clara, CA 95051-5173
Mailing Address710 Lawrence Expy Dept 272Santa Clara, CA 95051-5173
Phone(408) 554-9800
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2021
Enumeration DateApril 22, 2021
Last NPPES UpdateOctober 20, 20242 updates tracked since enumeration
NPPES CertifiedOctober 20, 2024
✔ NPI 1811579667 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · A197938
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
710 LAWRENCE EXPY DEPT 272, Santa Clara, CA 95051
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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

Dr. Hallen Pham 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 ID3476954116
PECOS Enrollment IDI20241115001372
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 Hallen Pham reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
0.1 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95051 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$121.77 typical visit price
range $23.96 – $169.60
Typical copayment $30.44 (range $5.99 – $42.40)
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 2

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

Tacrolimus, immediate release, oral, 1 mg J7507
Treatment-Treatment - Miscellaneous · category RX029N
1 supplier11 claims660 services$0.31 avg. paid by Medicare
Pharmacy supply fee for oral anti-cancer, oral anti-emetic or immunosuppressive drug(s); for the first prescription in a 30-day period Q0511
Treatment-Chemotherapy · category RH012N
1 supplier11 claims11 services$18.94 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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 Hallen Pham's NPI number?

The NPI number for Hallen Pham is 1811579667. It was assigned to this individual provider in the NPPES registry on April 22, 2021.

Where is Hallen Pham located?

Hallen Pham practices at 710 Lawrence Expy Dept 272, Santa Clara, CA 95051. The listed phone number is (408) 554-9800.

What is Hallen Pham's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Hallen Pham enrolled in Medicare?

Yes. Hallen Pham 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 organization bills Medicare for Hallen Pham's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hallen Pham reassigns Medicare benefits to Permanente Medical Group Inc (Santa Clara, CA). The 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 Hallen Pham'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 Hallen Pham was last updated on October 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.