JON MALLEN-ST. CLAIR M.D.
NPI 1134410038
Otolaryngology - Plastic Surgery within the Head & Neck in Los Angeles, CA

Q: What is Jon Mallen-st. Clair's NPI number?

The NPI number for Jon Mallen-st. Clair is 1134410038. It was assigned to this individual provider in the NPPES registry on April 26, 2011.

Q: What is Jon Mallen-st. Clair's specialty?

The primary specialty registered for this NPI is Otolaryngology, specializing in Plastic Surgery within the Head & Neck, with taxonomy code 207YX0007X.

Active since April 26, 2011PECOS EnrolledAccepts Medicare Assignment

85.71/100

CMS Quality Rating

8635 W 3RD ST STE 590W, LOS ANGELES, CA 90048(310) 423-1220(310) 423-1230 Get Directions Write a Review

NPPES record last updated: January 21, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 21, 2021, Jan 13, 2021, Sep 12, 2017 (3 updates tracked since 2017).

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About Jon Mallen-st. Clair M.d. NPPES

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

JON MALLEN-ST. CLAIR M.D. (NPI 1134410038) is an individual plastic surgery within the head & neck provider in Los Angeles, California, licensed in California (A125470) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS and is a graduate of New York University School Of Medicine (2011).

NPPES Registry Identity

NPI1134410038

Entity TypeIndividualMale

Primary Taxonomy207YX0007X

Provider Legal NameJON MALLEN-ST. CLAIRCredential: M.D.

Location Address8635 W 3RD ST STE 590WLos Angeles, CA 90048-6163

Mailing Address8635 W 3rd St Ste 590wLos Angeles, CA 90048-6163 · (310) 423-1220 · Fax (310) 423-1220

Phone(310) 423-1220

Fax(310) 423-1230

Sole ProprietorYes

Medical School CMSNew York University School Of MedicineGraduated 2011

Enumeration DateApril 26, 2011

Last NPPES UpdateJanuary 21, 20213 updates tracked since enumeration

NPPES CertifiedJanuary 21, 2021

✔ NPI 1134410038 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOtolaryngology · Plastic Surgery within the Head & NeckAllopathic & Osteopathic Physicians

Taxonomy Code207YX0007X

License✔ Licensed in CA · A125470

Definition

An otolaryngologist with additional training in plastic and reconstructive procedures within the head, face, neck and associated structures, including cutaneous head and neck oncology and reconstruction, management of maxillofacial trauma, soft tissue repair and neural surgery. The field is diverse and involves a wide age range of patients, from the newborn to the aged. While both cosmetic and reconstructive surgeries are practiced, there are many additional procedures which interface with them.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

8635 W 3RD ST STE 590W, Los Angeles, CA 90048

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Other Names 1

Other Name (5)Jon Mallen-st. Clair

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

Jon Mallen-st. Clair 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 ID7416240163

PECOS Enrollment IDI20160719000921

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 Jon Mallen-st. Clair reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cedars-Sinai Medical Care Foundation

0.2 mi

Anesthesiology

8700 BEVERLY BLVD STE SB-290
Los Angeles, CA 90048

Reassigned Medicare billing, California enrollment
2,118 clinicians in this Medicare group

NPI 1043826720 (310) 423-1447

University Of California Sfgh Medical Group

340 mi

Endocrinology, Diabetes & Metabolism

2540 23RD ST, 2ND FLOOR, ROOM 2110
San Francisco, CA 94143

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

NPI 1265407381 (415) 514-9031

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 8

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.

116 services96 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.

46 services41 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

36 services36 patients

Diagnostic exam of voice box using a flexible endoscope 31575

This procedure involves a doctor examining your voice box using a flexible endoscope, a thin tube with a light and camera. It's inserted through your nose or mouth to visualize your throat area. It helps detect any abnormalities in your voice box, ensuring optimal vocal health.

33 services28 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

31 services27 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

26 services26 patients

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.

85.71/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

85.67

Promoting Interoperability

100

Improvement Activities

Cost

61.47

Other Providers at the Same Location NPPES 20

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

NEELAYSH VUKKADALA M.D.

Otolaryngology