Rex Manayan, M.D.
NPI 1649278599 · Vascular Surgery Physician · Ontario, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Rex Manayan, M.D. is a Vascular Surgery Physician provider in Ontario, CA (NPI 1649278599).
Provider details
- NPI number
- 1649278599
- Entity type
- Individual
- Primary specialty
- Vascular Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G86289 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,142 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 545 | $87 |
| Chemical Destruction of First Incompetent Vein of Arm Or Leg Using Imaging Guidance36482 | 469 | $1,565 |
| Ultrasound Study of One Arm Or Leg Veins With Compression and Maneuvers93971 | 420 | $114 |
| Ultrasound Study of Arm Or Leg Veins With Compression and Maneuvers93970 | 204 | $177 |
| Injection of Chemical Agent Into Single Incompetent Vein of Leg Using Ultrasound Guidance36465 | 182 | $1,212 |
| Injection of Chemical Agent Into Multiple Incompetent Veins of Leg36471 | 109 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$111 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-13
- Last updated
- 2025-11-13
- Certified
- 2025-11-13
Frequently asked questions
- What is Rex Manayan's NPI number?
- Rex Manayan's National Provider Identifier (NPI) is 1649278599, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Rex Manayan's specialty?
- Rex Manayan is listed in the NPPES registry with a primary specialty of Vascular Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Rex Manayan located?
- Rex Manayan's practice location on file with NPPES is 3333 Concours Ste 100, Ontario, CA 91764-4875.
- What is Rex Manayan's phone number?
- The practice phone number listed in the NPPES registry for Rex Manayan is (909) 481-3242.
- Does Rex Manayan accept Medicare?
- Rex Manayan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Rex Manayan's NPI active?
- Yes — Rex Manayan's NPI (1649278599) is active in the NPPES registry as of the last update on 2025-11-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.