1. Home
  2. Directory
  3. California
  4. Monterey Park
  5. Family Medicine
  6. NPI Profile

HARRISON HASANUDDIN D.O.
NPI 1790165785
Family Medicine - Sleep Medicine in Monterey Park, CA

Active since June 04, 2015PECOS EnrolledAccepts Medicare Assignment
420 N GARFIELD AVE STE 203, MONTEREY PARK, CA 91754(626) 763-1899(626) 547-4438 Get Directions Write a Review

NPPES record last updated: June 22, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 22, 2025, Nov 5, 2024, Jul 11, 2023 and 1 more (4 updates tracked since 2021).

About Harrison Hasanuddin D.o. NPPES

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

HARRISON HASANUDDIN D.O. (NPI 1790165785) is an individual sleep medicine provider in Monterey Park, California, licensed in California (20A16309) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Arizona College Of Osteopathic Medicine Mid Western University (2015).

NPPES Registry Identity

NPI1790165785
Entity TypeIndividualMale
Primary Taxonomy207QS1201X
Provider Legal NameHARRISON HASANUDDINCredential: D.O.
Location Address420 N GARFIELD AVE STE 203Monterey Park, CA 91754-1206
Mailing Address420 N Garfield Ave Ste 203Monterey Park, CA 91754-1206 · (626) 763-1899 · Fax (626) 547-4438
Phone(626) 763-1899
Fax(626) 547-4438
Sole ProprietorYes
Medical School CMSArizona College Of Osteopathic Medicine Mid Western UniversityGraduated 2015
Enumeration DateJune 4, 2015
Last NPPES UpdateJune 22, 20254 updates tracked since enumeration
NPPES CertifiedJune 22, 2025
✔ NPI 1790165785 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyFamily Medicine · Sleep MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QS1201X
License✔ Licensed in CA · 20A16309
Definition
A Family Medicine Physician who practices Sleep Medicine is certified in the subspecialty of sleep medicine and specializes in the clinical assessment, physiologic testing, diagnosis, management and prevention of sleep and circadian rhythm disorders. Sleep specialists treat patients of any age and use multidisciplinary approaches. Disorders managed by sleep specialists include, but are not limited to, sleep related breathing disorders, insomnia, hypersomnias, circadian rhythm sleep disorders, parasomnias and sleep related movement disorders.
Also ListedFamily MedicineTaxonomy 207Q00000X · License 20A16309 (CA)
Also ListedFamily Medicine · Obesity MedicineTaxonomy 207QB0002X · License 20A16309 (CA)
420 N GARFIELD AVE STE 203, Monterey Park, CA 91754
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1333 1st St Ste ASan Francisco, CA 94105-2661 · Phone (888) 803-3370
Location 2415 N Crescent Dr Ste 320Beverly Hills, CA 90210-6813 · Phone (888) 803-3370

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

Harrison Hasanuddin D.o. 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 ID8729376405
PECOS Enrollment IDI20190102002289
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

3

Medicare enrollment records show Harrison Hasanuddin reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Harrison Hasanuddin, D.O., Inc.
Same address
Sleep Medicine
420 N GARFIELD AVE STE 203
Monterey Park, CA 91754
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Harrison Hasanuddin Do Inc
NPI 1386323038 (626) 763-1899
Sleep Reset Medical Group Of California PC
350 mi
Sleep Medicine
708 LONG BRIDGE ST APT 1609
San Francisco, CA 94158
  • Reassigned Medicare billing, California enrollment
  • 6 clinicians in this Medicare group
NPI 1659183622 (919) 943-6011
Sleep Reset Medical Group PA
350 mi
Sleep Medicine
708 LONG BRIDGE ST APT 1609
San Francisco, CA 94158
  • Reassigned Medicare billing, Illinois enrollment
  • 6 clinicians in this Medicare group
NPI 1003626797 (919) 943-6011

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.

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
28 services28 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.
24 services24 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.
16 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91754 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

Other Providers at the Same Location NPPES

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

HARRISON HASANUDDIN, D.O., INC.
Family Medicine (Sleep Medicine)
420 N GARFIELD AVE STE 203
MONTEREY PARK, CA 91754
Los Angeles County (626) 763-1899

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 Harrison Hasanuddin's NPI number?

The NPI number for Harrison Hasanuddin is 1790165785. It was assigned to this individual provider in the NPPES registry on June 4, 2015.

Where is Harrison Hasanuddin located?

Harrison Hasanuddin practices at 420 N Garfield Ave Ste 203, Monterey Park, CA 91754. The listed phone number is (626) 763-1899.

What is Harrison Hasanuddin's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Sleep Medicine, with taxonomy code 207QS1201X.

Is Harrison Hasanuddin enrolled in Medicare?

Yes. Harrison Hasanuddin 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 organizations bill Medicare for Harrison Hasanuddin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Harrison Hasanuddin reassigns Medicare benefits to 3 organizations: Harrison Hasanuddin, D.O., Inc. (Monterey Park, CA), Sleep Reset Medical Group Of California PC (San Francisco, CA) and Sleep Reset Medical Group PA (San Francisco, 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 Harrison Hasanuddin'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 Harrison Hasanuddin was last updated on June 22, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.