DR. JOHN MONTGOMERY YOST M.D.
NPI 1336451137
Dermatology in Redwood City, CA

Q: What is John Yost's NPI number?

The NPI number for John Yost is 1336451137. It was assigned to this individual provider in the NPPES registry on July 8, 2010.

Q: What is John Yost's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Q: When was this NPI record last updated?

The NPPES record for John Yost was last updated on September 3, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 July 08, 2010PECOS EnrolledAccepts Medicare Assignment

76.5/100

CMS Quality Rating

450 BROADWAY ST, STANFORD DEPT OF DERMATOLOGY, PAVILION C, 2ND FLOOR, REDWOOD CITY, CA 94063(650) 721-7190 Get Directions Write a Review

NPPES record last updated: September 3, 2014. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Dr. John Montgomery Yost M.d. NPPES

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

DR. JOHN MONTGOMERY YOST M.D. (NPI 1336451137) is an individual dermatology provider in Redwood City, California, licensed in California (A131385) and active in the NPI registry since July 2010. He is enrolled in Medicare PECOS and is a graduate of University Of Michigan Medical School (2010).

NPPES Registry Identity

NPI1336451137

Entity TypeIndividualMale

Primary Taxonomy207N00000X

Provider Legal NameDR. JOHN MONTGOMERY YOSTCredential: M.D.

Location Address450 BROADWAY ST, STANFORD DEPT OF DERMATOLOGY, PAVILION C, 2ND FLOORRedwood City, CA 94063-3132

Mailing Address450 Broadway St, Stanford Dept Of Dermatology, Pavilion C, 2nd FloorRedwood City, CA 94063-3132 · (650) 721-7190

Phone(650) 721-7190

Sole ProprietorNo

Medical School CMSUniversity Of Michigan Medical SchoolGraduated 2010

Enumeration DateJuly 8, 2010

Last NPPES UpdateSeptember 3, 2014

✔ NPI 1336451137 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians

Taxonomy Code207N00000X

License✔ Licensed in CA · A131385

Definition

A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.

450 BROADWAY ST, Redwood City, CA 94063

Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.Insurance ›

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. John Montgomery Yost 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 ID1557582962

PECOS Enrollment IDI20141029000942

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 John Yost reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

J Robert West, M.D., Inc

362 mi

Dermatology

400 NEWPORT CENTER DR STE 702
Newport Beach, CA 92660

Reassigned Medicare billing, California enrollment
Medicare enrollment name: J Robert West MD Inc
121 clinicians in this Medicare group

NPI 1932154788 (949) 644-0101

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 19

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.

Destruction of precancer skin growth, 2-14 growths 17003

This procedure involves removing 2-14 precancerous skin growths. The growths are treated to prevent them from potentially developing into skin cancer. The process is safe, with minimal discomfort, and promotes healthier skin.

4,361 services650 patients

Destruction of precancer skin growth, 1 growth 17000

"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.

1,200 services795 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.

1,199 services756 patients

Biopsy of related skin growth, first growth 11102

A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.

465 services397 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.

393 services291 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.

375 services375 patients

Destruction of skin growth, 1-14 growths 17110

"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.

323 services277 patients

Destruction of precancer skin growth, 15 or more growths 17004

This procedure involves removing 15 or more precancerous skin growths to prevent them from developing into cancer. It's done using various methods like freezing, creams, or minor surgery. The goal is to protect your health by stopping cancer before it starts.

174 services130 patients

Biopsy of related skin growth, each additional growth 11103

A biopsy of related skin growth is a procedure where a small piece of skin growth is removed for testing. If additional growths are identified, they may also be biopsied. This helps in diagnosing skin conditions and planning appropriate treatment.

124 services92 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.

103 services103 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.

70 services61 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

66 services28 patients

Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm 17262

This procedure involves removing a cancerous skin growth on the trunk, arms, or legs that is between 1.1 and 2.0 cm in size. The growth is destroyed using methods like surgery, laser, or freezing, aiming to eliminate cancer and prevent its spread.

31 services26 patients

Biopsy of ear 69100

A biopsy of the ear is a medical procedure where a small sample of tissue is taken from your ear for examination. This helps doctors diagnose any abnormalities or diseases. It's a simple process, usually done under local anesthesia, and has minimal risks.

23 services22 patients

Injection into skin growth, 1-7 growths 11900

This procedure involves injecting medication into 1-7 skin growths. The medication helps to reduce the size of the growths or completely eliminate them. It's a simple, quick, and usually painless process performed by a medical professional.

22 services19 patients

New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more 99202

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

18 services18 patients

Destruction of cancer skin growth of trunk, arms, or legs, 2.1-3.0 cm 17263

This procedure targets and eliminates a cancerous skin growth between 2.1 and 3.0 cm on your trunk, arms, or legs. It's done by applying specific treatments like heat, cold, or medicated creams to destroy the cancer cells, preventing them from spreading.

16 services14 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

14 services11 patients

Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm 11603

This procedure involves the removal of a cancerous skin growth, between 2.1 and 3.0 cm, from the body, arms, or legs. The area is numbed, then the growth is carefully cut out. The goal is to eliminate all cancer cells while minimizing scarring.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94063 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

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

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.

76.5/100

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

Scored as part of a group practice

Quality

74.31

Promoting Interoperability

100

Improvement Activities

Cost

43.95

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.

ALEXANDER CASPARY-ISAR

Physical Therapist (Orthopedic)

450 BROADWAY ST
REDWOOD CITY, CA 94063

San Mateo County (850) 766-7720

DR. CHRISTOPHER HARLOW LADD DO

Anesthesiology (Pain Medicine)

450 BROADWAY ST
REDWOOD CITY, CA 94063

San Mateo County (650) 723-6316

MRS. GLENDA LOUISE SWETMAN M.D.

Dermatology

450 BROADWAY ST, PAVILION C, 2ND FLOOR, MC 5334
REDWOOD CITY, CA 94063

San Mateo County (650) 721-7194

AMY XIN YIN M.D.

Student in an Organized Health Care Education/Training Program

450 BROADWAY ST
REDWOOD CITY, CA 94063

San Mateo County (650) 725-6134

SARAH A SILVERMAN PSY.D.

Psychologist (Health)

450 BROADWAY ST, PAVILION B, 2ND FLOOR
REDWOOD CITY, CA 94063

San Mateo County (650) 498-3931

BEATA JANE VAYNGORTIN MD

Student in an Organized Health Care Education/Training Program

450 BROADWAY ST
REDWOOD CITY, CA 94063

San Mateo County (650) 721-7669

TANIA MAE MENDOZA GOLO-ATKIN BSN, RN, AMB-BC

Registered Nurse (Orthopedic)

450 BROADWAY ST
REDWOOD CITY, CA 94063

San Mateo County (650) 723-5643

MISS KATE LAUREN KEVORKEN PT, DPT

Physical Therapist (Orthopedic)

450 BROADWAY ST, PAVILION B31, 3RD FLOOR
REDWOOD CITY, CA 94063

San Mateo County (650) 725-5106

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 John Yost's NPI number?

The NPI number for John Yost is 1336451137. It was assigned to this individual provider in the NPPES registry on July 8, 2010.

Where is John Yost located?

John Yost practices at 450 Broadway St Stanford Dept Of Dermatology, Pavilion C, 2nd Floor, Redwood City, CA 94063. The listed phone number is (650) 721-7190.

What is John Yost's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

Is John Yost enrolled in Medicare?

Yes. John Yost 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 John Yost's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Yost reassigns Medicare benefits to J Robert West, M.D., Inc (Newport Beach, 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 John Yost's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Yost accept?

Health plans from UnitedHealthcare list John Yost 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 John Yost was last updated on September 3, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.