1. Home
  2. Directory
  3. California
  4. Monrovia
  5. Internal Medicine
  6. NPI Profile

DR. JOHNNY SIA GAW I M.D.
NPI 1194717512
Internal Medicine - Cardiovascular Disease in Monrovia, CA

Active since August 22, 2005PECOS EnrolledAccepts Medicare Assignment
831 E HUNTINGTON DR STE 101, MONROVIA, CA 91016(702) 579-3203 Get Directions Write a Review

NPPES record last updated: December 15, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Johnny Sia Gaw I M.d. NPPES

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

DR. JOHNNY SIA GAW I M.D. (NPI 1194717512) is an individual cardiovascular disease provider in Monrovia, California, licensed in California (A38464) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, maintains a secondary practice location in Duarte, and is a graduate of Other (1973).

NPPES Registry Identity

NPI1194717512
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameDR. JOHNNY SIA GAW ICredential: M.D.
Location Address831 E HUNTINGTON DR STE 101Monrovia, CA 91016-6423
Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203
Phone(702) 579-3203
Sole ProprietorYes
Medical School CMSOtherGraduated 1973
Enumeration DateAugust 22, 2005
Last NPPES UpdateDecember 15, 2025
NPPES CertifiedDecember 15, 2025
✔ NPI 1194717512 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · A38464
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
831 E HUNTINGTON DR STE 101, Monrovia, CA 91016
Open in Google Maps ↗

Other Names 1

Other Name (5)Dr. Johnny Cohu Gaw M.d.

Secondary Practice Location 1

Location 1931 Buena Vista St, Suite #106Duarte, CA 91010-1712 · Phone (626) 359-8929 · Fax (626) 359-2280

Other Identifiers 1

Medicaid00A384640CA

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. Johnny Sia Gaw I M.d. 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 ID7416122981
PECOS Enrollment IDI20111214000118
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 Johnny Gaw reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Healthcare Partners Affiliates Medical Group
18 mi
Internal Medicine
1120 W WASHINGTON BLVD
Los Angeles, CA 90015
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1659312593 (213) 623-2225

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.

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.
124 services48 patients
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.
24 services24 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
15 services13 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91016 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
46%302 patients3/55-star benchmark: 85%
Diabetes: Medical Attention for Nephropathy
The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period
83%126 patients4/55-star benchmark: 99%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
99%2,490 patients4/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
100%4,678 patients5/55-star benchmark: 100%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
97%89 patients4/55-star benchmark: 100%
Pneumococcal Vaccination Status for Older Adults
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
51%405 patients3/55-star benchmark: 90%
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
51%574 patients3/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
3%574 patients1/55-star benchmark: 79%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 1% · 405 patients
2%405 patients4/55-star benchmark: 100%
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 5

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

ZAW YE MD
Family Medicine
831 E HUNTINGTON DR STE 101
MONROVIA, CA 91016
Los Angeles County (626) 358-0269
DAISHA ORTEGA MD
Family Medicine
831 E HUNTINGTON DR STE 101
MONROVIA, CA 91016
Los Angeles County (626) 358-0269
JOCELYN WANG NP
Nurse Practitioner (Adult Health)
831 E HUNTINGTON DR STE 101
MONROVIA, CA 91016
Los Angeles County (626) 358-0269
DR. NANDAR MIN SWE MD
Internal Medicine
831 E HUNTINGTON DR STE 101
MONROVIA, CA 91016
Los Angeles County (626) 358-0269
GEORGE DAJKOVICH N.P.
Nurse Practitioner (Acute Care)
831 E HUNTINGTON DR STE 101
MONROVIA, CA 91016
Los Angeles County (626) 358-0269

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 Johnny Gaw's NPI number?

The NPI number for Johnny Gaw is 1194717512. It was assigned to this individual provider in the NPPES registry on August 22, 2005. The provider is also known as Dr. Johnny Cohu Gaw M.D..

Where is Johnny Gaw located?

Johnny Gaw practices at 831 E Huntington Dr Ste 101, Monrovia, CA 91016. The listed phone number is (702) 579-3203.

What is Johnny Gaw's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Johnny Gaw enrolled in Medicare?

Yes. Johnny Gaw 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 Johnny Gaw's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Johnny Gaw reassigns Medicare benefits to Healthcare Partners Affiliates Medical Group (Los Angeles, 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 Johnny Gaw'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 Johnny Gaw was last updated on December 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.