DR. HESPER PHAM O.D.
NPI 1265728570
Optometrist in Mission Viejo, CA

Q: What is Hesper Pham's NPI number?

The NPI number for Hesper Pham is 1265728570. It was assigned to this individual provider in the NPPES registry on June 24, 2011.

Q: What is Hesper Pham's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Q: When was this NPI record last updated?

The NPPES record for Hesper Pham was last updated on December 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.

Active since June 24, 2011PECOS Enrolled

27871 MEDICAL CENTER RD STE 120, MISSION VIEJO, CA 92691(949) 364-6688(949) 368-6689 Get Directions Write a Review

NPPES record last updated: December 30, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Hesper Pham O.d. NPPES

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

DR. HESPER PHAM O.D. (NPI 1265728570) is an individual optometrist in Mission Viejo, California, licensed in California (15212) and active in the NPI registry since June 2011. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1265728570

Entity TypeIndividualFemale

Primary Taxonomy152W00000X

Provider Legal NameDR. HESPER PHAMCredential: O.D.

Location Address27871 MEDICAL CENTER RD STE 120Mission Viejo, CA 92691-6405

Mailing Address9061 Bolsa Ave Ste 105Westminster, CA 92683-5558 · (714) 899-5670

Phone(949) 364-6688

Fax(949) 368-6689

Sole ProprietorNo

Enumeration DateJune 24, 2011

Last NPPES UpdateDecember 30, 2021

NPPES CertifiedDecember 30, 2021

✔ NPI 1265728570 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

License✔ Licensed in CA · 15212

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

27871 MEDICAL CENTER RD STE 120, Mission Viejo, CA 92691

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Hesper Pham O.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Thomas S Tooma M D A Professional Corporation

13 mi

Ophthalmology

4220 VON KARMAN AVE STE 100
Newport Beach, CA 92660

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

NPI 1922129865 (492) 847-4289

Luis A Chanes M D Inc

17 mi

Specialist

2621 S BRISTOL ST, SUITE 205
Santa Ana, CA 92704

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

NPI 1568481679 (714) 557-5777

Cuong-Dung Do, M.D., Inc

22 mi

Ophthalmology

9061 BOLSA AVE STE 105
Westminster, CA 92683

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

NPI 1992816268 (714) 899-5670

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 92691 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

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

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

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

SAMIRA KHAN MD

Ophthalmology

27871 MEDICAL CENTER RD STE 120
MISSION VIEJO, CA 92691

Orange County (714) 901-2006

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 Hesper Pham's NPI number?

The NPI number for Hesper Pham is 1265728570. It was assigned to this individual provider in the NPPES registry on June 24, 2011.

Where is Hesper Pham located?

Hesper Pham practices at 27871 Medical Center Rd Ste 120, Mission Viejo, CA 92691. The listed phone number is (949) 364-6688.

What is Hesper Pham's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Hesper Pham enrolled in Medicare?

Yes. Hesper Pham is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Hesper Pham's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Hesper Pham reassigns Medicare benefits to 3 organizations: Thomas S Tooma M D A Professional Corporation (Newport Beach, CA), Luis A Chanes M D Inc (Santa Ana, CA) and Cuong-Dung Do, M.D., Inc (Westminster, 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 Hesper Pham's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Hesper Pham accept?

Health plans from Anthem Blue Cross and Blue Shield and Providence Health Plan list Hesper Pham 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.

When was this NPI record last updated?

The NPPES record for Hesper Pham was last updated on December 30, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.