DIEM QUYNH PHAM D.O.
NPI 1255421335
Dermatology - Procedural Dermatology in Chino Hills, CA

Q: What is Diem Pham's NPI number?

The NPI number for Diem Pham is 1255421335. It was assigned to this individual provider in the NPPES registry on October 13, 2006.

Q: What is Diem Pham's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in Procedural Dermatology, with taxonomy code 207NS0135X.

Q: When was this NPI record last updated?

The NPPES record for Diem Pham was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since October 13, 2006PECOS EnrolledAccepts Medicare Assignment

89.23/100

CMS Quality Rating

3110 CHINO AVE STE 120, CHINO HILLS, CA 91709(909) 313-5111 Get Directions Write a Review

NPPES record last updated: May 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 13, 2026, Jan 19, 2021, Dec 15, 2020 and 1 more (4 updates tracked since 2018).

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About Diem Quynh Pham D.o. NPPES

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

DIEM QUYNH PHAM D.O. (NPI 1255421335) is an individual procedural dermatology provider in Chino Hills, California, licensed in California (20A7309) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS and is a graduate of College Of Osteo Med Of The Pacific At Pomona (1997).

NPPES Registry Identity

NPI1255421335

Entity TypeIndividualFemale

Primary Taxonomy207NS0135X

Provider Legal NameDIEM QUYNH PHAMCredential: D.O.

Location Address3110 CHINO AVE STE 120Chino Hills, CA 91709-1294

Mailing Address3110 Chino Ave Ste 120Chino Hills, CA 91709-1294 · (909) 313-5111 · Fax (909) 313-0959

Phone(909) 313-5111

Sole ProprietorYes

Medical School CMSCollege Of Osteo Med Of The Pacific At PomonaGraduated 1997

Enumeration DateOctober 13, 2006

Last NPPES UpdateMay 13, 20264 updates tracked since enumeration

NPPES CertifiedMay 13, 2026

✔ NPI 1255421335 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatology · Procedural DermatologyAllopathic & Osteopathic Physicians

Taxonomy Code207NS0135X

License✔ Licensed in CA · 20A7309

Definition

Procedural Dermatology, a subspecialty of Dermatology, encompassing a wide variety of surgical procedures and methods to remove or modify skin tissue for health or cosmetic benefit. These methods include scalpel surgery, laser surgery, chemical surgery, cryosurgery (liquid nitrogen), electrosurgery, aspiration surgery, liposuction, injection of filler substances, and Mohs micrographic controlled surgery (a special technique for the removal of growths, especially skin cancers).

3110 CHINO AVE STE 120, Chino Hills, CA 91709

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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

Diem Quynh Pham D.o. 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 ID4880693845

PECOS Enrollment IDI20061220000525

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 13

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.

534 services57 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.

355 services147 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.

246 services20 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.

163 services97 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.

102 services66 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.

94 services44 patients

Destruction of skin growth, 15 or more growths 17111

"Destruction of skin growth" refers to a procedure where unwanted skin growths, such as warts or moles, are removed. In this case, 15 or more growths are treated. Techniques may include freezing, burning, or laser therapy. It's a safe, quick process to improve skin health.

58 services34 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.

40 services40 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.

35 services30 patients

Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm 11301

This procedure involves the careful removal of a small skin growth on the body, arms, or legs. It's done by shaving off the growth that's 0.6-1.0 cm in size. It's a common, safe method to treat non-cancerous skin growths and improve skin appearance.

33 services28 patients

Shaving of skin growth of body, arms, or legs, 0.5 cm or less 11300

This is a simple procedure where a small skin growth on your body, arms, or legs, measuring 0.5 cm or less, is carefully shaved off. It's typically quick, with minimal discomfort. It helps to prevent any potential health issues related to the growth.

22 services17 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.

19 services18 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.

15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91709 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

$91.88 typical visit price

range $59.60 – $179.42

Typical copayment $22.97 (range $14.90 – $44.85)

Most-billed visit code 99203

Established Patient

$74.08 typical visit price

range $19.37 – $146.42

Typical copayment $18.52 (range $4.84 – $36.60)

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.

89.23/100

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

Scored as part of a group practice

Quality

75.77

Improvement Activities

Other Providers at the Same Location NPPES 3

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

SAND DERMATOLOGY PC

Dermatology

3110 CHINO AVE STE 120
CHINO HILLS, CA 91709

San Bernardino County (562) 659-4492

SAND DERMATOLOGY PC

Dermatology

3110 CHINO AVE STE 120
CHINO HILLS, CA 91709

San Bernardino County (909) 313-5111

LAUREN DUFFY

Nurse Practitioner (Family)

3110 CHINO AVE STE 120
CHINO HILLS, CA 91709

San Bernardino County (909) 313-5111

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 Diem Pham's NPI number?

The NPI number for Diem Pham is 1255421335. It was assigned to this individual provider in the NPPES registry on October 13, 2006.

Where is Diem Pham located?

Diem Pham practices at 3110 Chino Ave Ste 120, Chino Hills, CA 91709. The listed phone number is (909) 313-5111.

What is Diem Pham's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in Procedural Dermatology, with taxonomy code 207NS0135X.

Is Diem Pham enrolled in Medicare?

Yes. Diem Pham 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 Diem Pham was last updated on May 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.