TIMOTHY W CHANG MD
NPI 1962766337
Dermatology - MOHS-Micrographic Surgery in La Jolla, CA

Q: What is Timothy Chang's NPI number?

The NPI number for Timothy Chang is 1962766337. It was assigned to this individual provider in the NPPES registry on June 29, 2012.

Q: What is Timothy Chang's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Chang was last updated on April 18, 2019. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since June 29, 2012PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

9850 GENESEE AVE STE 850, LA JOLLA, CA 92037(858) 657-0267(858) 657-9485 Get Directions Write a Review

NPPES record last updated: April 18, 2019. Verified against the NPPES registry weekly; last sync: July 26, 2026.

On this page

About Timothy W Chang Md NPPES

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

TIMOTHY W CHANG MD (NPI 1962766337) is an individual mohs-micrographic surgery provider in La Jolla, California, licensed in California (A142954) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS and is a graduate of Medical College Of Wisconsin (2012).

NPPES Registry Identity

NPI1962766337

Entity TypeIndividualMale

Primary Taxonomy207ND0101X

Provider Legal NameTIMOTHY W CHANGCredential: MD

Location Address9850 GENESEE AVE STE 850La Jolla, CA 92037-1233

Mailing Address9850 Genesee Ave Ste 850La Jolla, CA 92037-1233 · (858) 657-0267 · Fax (858) 657-9485

Phone(858) 657-0267

Fax(858) 657-9485

Sole ProprietorNo

Medical School CMSMedical College Of WisconsinGraduated 2012

Enumeration DateJune 29, 2012

Last NPPES UpdateApril 18, 2019

✔ NPI 1962766337 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatology · MOHS-Micrographic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207ND0101X

License✔ Licensed in CA · A142954

Definition

The highly-trained surgeons that perform Mohs Micrographic Surgery are specialists both in dermatology and pathology. With their extensive knowledge of the skin and unique pathological skills, they are able to remove only diseased tissue, preserving healthy tissue and minimizing the cosmetic impact of the surgery. Mohs surgeons who belong to the American College of Mohs Surgery (ACMS) have completed a minimum of one year of fellowship training at one of the ACMS-approved training centers in the U.S.

9850 GENESEE AVE STE 850, La Jolla, CA 92037

Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Timothy W Chang Md 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 ID4880849587

PECOS Enrollment IDI20170420002701

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.

Areas of Expertise CMS Part B claims 37

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.

2,257 services306 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.

923 services394 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.

811 services378 patients

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks 17311

This procedure involves the careful removal of a growth from the head, neck, hands, or feet. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to study its characteristics and determine the nature of the growth.

373 services277 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.

325 services204 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.

254 services170 patients

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

249 services156 patients

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks 17312

This procedure involves the careful removal of abnormal growths from the head, neck, hands, or feet. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any irregularities. The process may be carried out in multiple stages for thorough examination.

233 services122 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.

211 services158 patients

Removal and microscopic exam of growth of trunk, arms, or legs, 1-5 tissue blocks 17313

This procedure involves the removal of a growth from your trunk, arms, or legs. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to identify any abnormalities. This helps in diagnosing and planning further treatment.

130 services105 patients

Complicated repair of wound of scalp, arms, or legs, 2.6-7.5 cm 13121

This is a procedure to repair a complex wound on your scalp, arm, or leg that is 2.6-7.5 cm long. It involves cleaning, removing damaged tissue, and stitching the wound to promote healing. It's performed under local or general anesthesia.

120 services95 patients

Repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet by transferring skin, 10.0 sq cm or less 14040

This procedure involves repairing a wound on various body parts by transferring skin from another area. The transferred skin, up to 10.0 sq cm, helps to cover the wound, promoting healing and reducing scarring. It's a common method for treating larger or deeper wounds.

109 services94 patients

Repair of wound of eyelids, nose, ears, or lips by transferring skin, 10.0 sq cm or less 14060

This procedure involves repairing a wound on the eyelids, nose, ears, or lips by moving a small piece of skin (10.0 sq cm or less) from one area to another. The goal is to heal the wound and restore the function and appearance of the affected area.

87 services77 patients

Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm 13132

This procedure involves the complex repair of a wound in areas like the forehead, cheeks, chin, mouth, neck, underarms, hands, or feet. The wound size ranges from 2.6-7.5 cm. The process includes cleaning, removing damaged tissue, and stitching the wound for proper healing.

67 services61 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.

57 services57 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.

51 services47 patients

Removal and microscopic exam of growth of trunk, arms, or legs, each additional stage, 1-5 tissue blocks 17314

This procedure involves removing growths from the trunk, arms, or legs. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any abnormalities. This aids in diagnosing and treating your condition effectively.

46 services35 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.

45 services31 patients

Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 1.1-2.5 cm 13131

This procedure involves the complex repair of a wound in areas like the forehead, cheeks, chin, mouth, neck, underarms, hands, or feet. The wound size is between 1.1-2.5 cm. This repair may involve multiple layers of sutures and could require reconstruction of the skin.

40 services37 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.

39 services39 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.

30 services19 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.

28 services14 patients

Repair of wound of scalp, arms, or legs by transferring skin, 10.0 sq cm or less 14020

This procedure involves repairing a wound on your scalp, arm, or leg by transferring a small piece of skin, 10.0 sq cm or less, from a different area of your body. This skin graft helps promote healing and minimizes scarring.

23 services22 patients

Full thickness skin graft to nose, ears, eyelids, or lips, 20.0 sq cm or less 15260

A full thickness skin graft is a procedure where a layer of skin is taken from one area of the body and transplanted to another. If it's done on the nose, ears, eyelids, or lips, it helps restore these areas when damaged. The size of the graft is 20.0 sq cm or less.

23 services23 patients

Punch biopsy, first skin growth 11104

A punch biopsy is a procedure where a small, circular tool is used to remove a sample of skin tissue. This is usually done to test a skin growth for potential issues. You may feel a pinch, but discomfort is minimal. The area heals quickly.

22 services20 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.

21 services14 patients

Special stained specimen slides to examine tissue and frozen preparation of specimen including interpretation and report 88314

This process involves staining tissue samples on slides to highlight different elements and examine them under a microscope. In some cases, the specimen is quickly frozen to preserve its structure. A detailed report is provided after interpretation of the results.

21 services12 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

17 services15 patients

Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm 11602

This procedure involves the surgical removal of a cancerous skin growth on the body, arms, or legs. The growth is between 1.1 and 2.0 cm in size. The goal is to eliminate cancer cells and prevent them from spreading to other parts of the body.

16 services15 patients

Complicated repair of wound of trunk, 2.6-7.5 cm 13101

This service involves the intricate repair of a wound on your body's main structure, between your neck and limbs. The wound measures 2.6-7.5 cm. The procedure includes deep-layer stitching and may involve repairing damaged tissue.

16 services15 patients

Application of light with debridement to destroy precancer skin growth 96574

This procedure involves applying a special light source to the skin after removing dead tissue (debridement). The light helps destroy precancerous growths, preventing them from developing into skin cancer. It's a safe and effective method to keep your skin healthy.

16 services11 patients

Aminolevulinic acid hcl for topical administration, 20%, single unit dosage form (354 mg) J7308

Aminolevulinic Acid HCL is a medication applied to the skin to treat certain types of skin conditions. It works by making the skin more sensitive to light, which helps to kill abnormal skin cells. The 20% solution is a single dose of 354 mg.

16 services11 patients

Biopsy of eyelid 67810

A biopsy of the eyelid is a procedure where a small piece of tissue is taken from your eyelid for examination. It helps identify any abnormal growth like a lump or cyst. It's done under local anesthesia, so you won't feel pain during the process.

15 services13 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

15 services13 patients

Simple or single drainage of skin abscess 10060

A simple or single drainage of skin abscess is a procedure to remove pus from a skin infection. A small cut is made on the abscess, the pus is drained out, and the area is cleaned. This helps to reduce pain, speed up recovery, and prevent the spread of infection.

13 services12 patients

Repair of wound of scalp, arms, or legs by transferring skin, 10.1-30.0 sq cm 14021

This procedure involves repairing a wound on your scalp, arm, or leg by moving skin from another part of your body. The skin transferred will cover an area between 10.1 to 30.0 square cm. This helps promote healing and reduce scarring.

13 services13 patients

Full thickness skin graft to scalp, arms, or legs, 20.0 sq cm or less 15220

A full-thickness skin graft involves transferring a layer of skin from one area of the body to the scalp, arms, or legs. This procedure, covering an area 20.0 sq cm or less, aids in healing wounds or areas with skin loss. It's a safe, common surgical practice.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92037 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

$94.87 typical visit price

range $62.10 – $184.71

Typical copayment $23.71 (range $15.52 – $46.17)

Most-billed visit code 99203

Established Patient

$76.87 typical visit price

range $20.62 – $151.42

Typical copayment $19.21 (range $5.15 – $37.85)

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.

75/100

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

Scored as part of a group practice

Leave this field empty

Other Providers at the Same Location NPPES

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

DR. JOYCE CHENG MD, MHS

Dermatology

9850 GENESEE AVE STE 850
LA JOLLA, CA 92037

San Diego County (858) 657-0267

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 Timothy Chang's NPI number?

The NPI number for Timothy Chang is 1962766337. It was assigned to this individual provider in the NPPES registry on June 29, 2012.

Where is Timothy Chang located?

Timothy Chang practices at 9850 Genesee Ave Ste 850, La Jolla, CA 92037. The listed phone number is (858) 657-0267.

What is Timothy Chang's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Is Timothy Chang enrolled in Medicare?

Yes. Timothy Chang 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.

When was this NPI record last updated?

The NPPES record for Timothy Chang was last updated on April 18, 2019. NPI Profile syncs with the weekly NPPES data releases published by CMS.