SAM ABAZA M.D.
NPI 1831148501
Dermatology in Diamond Bar, CA

Q: What is Sam Abaza's NPI number?

The NPI number for Sam Abaza is 1831148501. It was assigned to this individual provider in the NPPES registry on May 9, 2006. The provider is also known as Moutasem Abaza MD.

Q: What is Sam Abaza'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 Sam Abaza was last updated on November 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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 May 09, 2006PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

1111 GRAND AVE STE K, DIAMOND BAR, CA 91765(098) 604-2549 Get Directions Write a Review

NPPES record last updated: November 17, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 17, 2025, Sep 10, 2023, Mar 17, 2018 (3 updates tracked since 2018).

On this page

About Sam Abaza M.d. NPPES

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

SAM ABAZA M.D. (NPI 1831148501) is an individual dermatology provider in Diamond Bar, California, licensed in California (A86393) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (1993).

NPPES Registry Identity

NPI1831148501

Entity TypeIndividualMale

Primary Taxonomy207N00000X

Provider Legal NameSAM ABAZACredential: M.D.

Location Address1111 GRAND AVE STE KDiamond Bar, CA 91765-4172

Mailing Address1111 Grand Ave Ste KDiamond Bar, CA 91765-4172 · (098) 604-2549

Phone(098) 604-2549

Sole ProprietorNo

Medical School CMSOtherGraduated 1993

Enumeration DateMay 9, 2006

Last NPPES UpdateNovember 17, 20253 updates tracked since enumeration

NPPES CertifiedNovember 17, 2025

✔ NPI 1831148501 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians

Taxonomy Code207N00000X

License✔ Licensed in CA · A86393

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.

Also ListedDermatology · MOHS-Micrographic SurgeryTaxonomy 207ND0101X · License A86393 (CA)

1111 GRAND AVE STE K, Diamond Bar, CA 91765

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Other Names 1

Former Name (1)Moutasem Abaza Md

Secondary Practice Locations 2

Location 1631 W Avenue Q Ste BPalmdale, CA 93551-3892 · Phone (661) 947-9000 · Fax (661) 266-8751

Location 2175 S Harbor BlvdAnaheim, CA 92805-3710 · Phone (909) 860-4254

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

Sam Abaza 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 ID9436122488

PECOS Enrollment IDI20051223000167

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 Sam Abaza reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Dermesurge Inc

Same address

Dermatology

1111 GRAND AVE STE K
Diamond Bar, CA 91765

Reassigned Medicare billing, California enrollment

NPI 1538743752 (909) 860-4254

Family Primary And Specialty Care Clinic

35 mi

Family Medicine

1210 NEVADA ST
Redlands, CA 92374

Reassigned Medicare billing, California enrollment

NPI 1871487199 (661) 425-0295

La Laser Center, PC, A Professional Medical Corporation

40 mi

Multi-Specialty

161 AVENIDA VAQUERO
San Clemente, CA 92672

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

NPI 1306982855 (949) 652-3095

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 31

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.

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.

454 services353 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.

320 services126 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.

316 services199 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.

170 services146 patients

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.

158 services19 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.

96 services32 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.

96 services85 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.

87 services62 patients

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

77 services65 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.

75 services44 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.

66 services60 patients

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

54 services45 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.

48 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.

47 services47 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.

43 services28 patients

Repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet by transferring skin, 10.1-30.0 sq cm 14041

This procedure involves repairing a wound on specified body areas by transferring skin from another part of the body. The transferred skin, measuring between 10.1 to 30.0 square cm, aids in healing the wound and restoring the skin's normal function.

35 services31 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.

34 services23 patients

Complicated repair of wound of eyelids, nose, ears, or lip, 2.6-7.5 cm 13152

This procedure involves repairing a wound on your eyelids, nose, ears, or lip that is between 2.6 and 7.5 cm long. It's considered complicated due to the location and size. The doctor will clean, treat, and stitch the wound to promote healing.

29 services28 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.

29 services22 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.

29 services20 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.

22 services15 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.

21 services17 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.

20 services17 patients

Shaving of skin growth of scalp, neck, hands, feet, or genitals, 0.5 cm or less 11305

This is a procedure where a small skin growth on the scalp, neck, hands, or feet, measuring 0.5 cm or less, is carefully removed. The process involves shaving off the growth layer by layer to ensure complete removal. It's a safe and common practice.

16 services15 patients

Complicated repair of wound of eyelids, nose, ears, or lip, 2.6-7.5 cm 13152

16 services16 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.

15 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.

13 services12 patients

Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.5 cm or less 11310

This procedure involves the careful removal of a small skin growth on the face or related areas. A medical professional uses a special tool to gently shave off the growth, which is 0.5 cm or less. It's a common, safe procedure.

12 services11 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.

12 services12 patients

Repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet by transferring skin, 10.1-30.0 sq cm 14041

12 services12 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.

12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91765 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

$96.36 typical visit price

range $62.96 – $187.60

Typical copayment $24.09 (range $15.74 – $46.90)

Most-billed visit code 99203

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

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

Reported Quality Measures

Biopsy Follow-Up

Percentage of new patients whose biopsy results have been reviewed and communicated to the primary care/referring physician and patient by the performing physician

100%75 patients5/55-star benchmark: 100%

Care Plan

Percentage of patients aged 65 years and older who have an advance care plan or surrogate decision maker documented in the medical record that an advance care plan was discussed but the patient did not wish or was not able to name a surrogate decision maker…

100%249 patients5/55-star benchmark: 100%

e-Prescribing

At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.

96%718 patients4/55-star benchmark: 100%

Patient-Specific Education

The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.

48%2,349 patients2/55-star benchmark: 100%

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user

63%27 patients3/55-star benchmark: 100%

Preventive Care and Screening: Unhealthy Alcohol Use: Screening & Brief Counseling

Percentage of patients aged 18 years and older who were screened for unhealthy alcohol use using a systematic screening method at least once within the last 24 months AND who received brief counseling if identified as an unhealthy alcohol user

65%430 patients3/55-star benchmark: 100%

Provide Patient Access

At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…

48%2,349 patients2/55-star benchmark: 100%

Tobacco Use and Help with Quitting Among Adolescents

The percentage of adolescents 12 to 20 years of age with a primary care visit during the measurement year for whom tobacco use status was documented and received help with quitting if identified as a tobacco user

100%96 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

DERMESURGE INC

Clinic/Center (Medical Specialty)

1111 GRAND AVE STE K
DIAMOND BAR, CA 91765

Los Angeles County (909) 860-4254

FELIPE DE JESUS CORONADO PA-C

Physician Assistant

1111 GRAND AVE STE K
DIAMOND BAR, CA 91765

Los Angeles County (909) 860-4254

DERMESURGE INC

Dermatology

1111 GRAND AVE STE K
DIAMOND BAR, CA 91765

Los Angeles County (909) 860-4254

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 Sam Abaza's NPI number?

The NPI number for Sam Abaza is 1831148501. It was assigned to this individual provider in the NPPES registry on May 9, 2006. The provider is also known as Moutasem Abaza MD.

Where is Sam Abaza located?

Sam Abaza practices at 1111 Grand Ave Ste K, Diamond Bar, CA 91765. The listed phone number is (098) 604-2549.

What is Sam Abaza's specialty?

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

Is Sam Abaza enrolled in Medicare?

Yes. Sam Abaza 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 organizations bill Medicare for Sam Abaza's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sam Abaza reassigns Medicare benefits to 3 organizations: Dermesurge Inc (Diamond Bar, CA), Family Primary And Specialty Care Clinic (Redlands, CA) and La Laser Center, PC, A Professional Medical Corporation (San Clemente, CA). Each 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 Sam Abaza's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Sam Abaza was last updated on November 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.