DR. MARGARET M SHANNON M.D.
NPI 1265449441
Dermatology in Costa Mesa, CA

Q: What is Margaret Shannon's NPI number?

The NPI number for Margaret Shannon is 1265449441. It was assigned to this individual provider in the NPPES registry on August 1, 2006.

Q: What is Margaret Shannon'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 Margaret Shannon was last updated on August 5, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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 August 01, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 05D0687205 · Certificate of Compliance

0/100

CMS Quality Rating

275 VICTORIA ST, SUITE 1H, COSTA MESA, CA 92627(949) 646-2311(949) 646-1064 Get Directions Write a Review

NPPES record last updated: August 5, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

On this page

About Dr. Margaret M Shannon M.d. NPPES

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

DR. MARGARET M SHANNON M.D. (NPI 1265449441) is an individual dermatology provider in Costa Mesa, California, licensed in California (G42251) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS, holds a CLIA Certificate of Compliance certificate valid through August 31, 2027, and is a graduate of Georgetown University School Of Medicine (1979).

NPPES Registry Identity

NPI1265449441

Entity TypeIndividualFemale

Primary Taxonomy207N00000X

Provider Legal NameDR. MARGARET M SHANNONCredential: M.D.

Location Address275 VICTORIA ST, SUITE 1HCosta Mesa, CA 92627-1906

Mailing Address275 Victoria St, Suite 1hCosta Mesa, CA 92627-1906 · (949) 646-2311 · Fax (949) 646-1064

Phone(949) 646-2311

Fax(949) 646-1064

Sole ProprietorYes

Medical School CMSGeorgetown University School Of MedicineGraduated 1979

Enumeration DateAugust 1, 2006

Last NPPES UpdateAugust 5, 2010

✔ NPI 1265449441 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians

Taxonomy Code207N00000X

License✔ Licensed in CA · G42251

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.

275 VICTORIA ST, Costa Mesa, CA 92627

Open in Google Maps ↗

Other Identifiers 1

Medicare ID-Type UnspecifiedG42251CA

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

Dr. Margaret M Shannon 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 ID2264626191

PECOS Enrollment IDI20101104000305

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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 05D0687205

Margaret Shannon MD, Inc · Newport Beach, CA

Active · expires Aug 31, 2027

CLIA Number05D0687205

Laboratory TypePhysician Office

Certificate Effective DateSeptember 1, 2025

Certificate Expiration DateAugust 31, 2027

Laboratory DirectorMargaret Shannon

Laboratory Phone(949) 646-2311

Laboratory LocationMargaret Shannon MD, Inc400 Newport Center Dr, #501, Newport Beach, CA 92660

CLIA data matches this NPI record on: Name Phone

This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Areas of Expertise CMS Part B claims 24

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.

2,885 services358 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.

740 services453 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.

641 services407 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.

499 services290 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.

384 services300 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.

121 services89 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.

110 services92 patients

Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm 12032

This procedure involves the repair of a wound between 2.6-7.5 cm located on the scalp, underarms, trunk, arms, or legs. The process includes cleaning, debridement (removal of damaged tissue), and suturing (stitching) of the wound to promote healing.

99 services80 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.

85 services67 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.

65 services38 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.

65 services65 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.

47 services37 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.

35 services22 patients

Intermediate repair of wound of face, ears, eyelids, nose, lips, or mouth, 2.6-5.0 cm 12052

This procedure involves repairing a wound on the face, ears, eyelids, nose, lips, or mouth that measures between 2.6-5.0 cm. The process includes cleaning, suturing if necessary, and dressing the wound to promote healing and prevent infection.

33 services29 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.

31 services26 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.

21 services19 patients

Intermediate repair of wound of face, ears, eyelids, nose, lips, or mouth, 2.5 cm or less 12051

This procedure involves repairing a wound on your face, ears, eyelids, nose, lips, or mouth. The wound is 2.5 cm or less in size. The repair process includes cleaning, treating, and stitching the wound to promote optimal healing. It's a standard, safe procedure.

19 services16 patients

Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less 12031

This procedure involves the repair of a wound that is located on the scalp, underarms, trunk, arms, or legs and is 2.5 cm or less in size. The repair is intermediate, meaning it's more complex than a simple closure, but not as extensive as a complex repair.

18 services18 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.

17 services14 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.

14 services14 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.

14 services12 patients

Intermediate repair of wound of neck, hands, feet, or genitals, 2.6-7.5 cm 12042

This is a procedure to mend a moderate wound between 2.6-7.5 cm on your neck, hands, or feet. It involves cleaning the wound, removing any damaged tissue, and stitching it back together to promote healing and minimize scarring.

14 services14 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.

14 services12 patients

Removal of cancer skin growth of body, arms, or legs, 3.1-4.0 cm 11604

This procedure involves removing a cancerous skin growth measuring 3.1-4.0 cm on the body, arms, or legs. The area is numbed, then the growth is carefully cut out. The wound is stitched for healing. Regular follow-ups ensure complete removal and recovery.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92627 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.

0/100

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

Individually scored

Quality

Improvement Activities

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.

NAZLI AHMED, M.D., INC.

Family Medicine

275 VICTORIA ST, # 2M
COSTA MESA, CA 92627

Orange County (949) 642-5390

INNOVATIVE RX INC

Pharmacy (Compounding Pharmacy)

275 VICTORIA ST, STE 1F
COSTA MESA, CA 92627

Orange County (949) 642-0106

NEWPORT MESA MEDICAL GROUP, INC

Internal Medicine

275 VICTORIA ST, STE 1E
COSTA MESA, CA 92627

Orange County (949) 574-3615

DR. DAVID GREENBERG D.C.

Chiropractor

275 VICTORIA ST, STE. 2A
COSTA MESA, CA 92627

Orange County (949) 574-2700

ESPERANZA TONG

Licensed Vocational Nurse

275 VICTORIA ST
COSTA MESA, CA 92627

Orange County (949) 629-2860

KAREN MUNA MFT

Marriage & Family Therapist

275 VICTORIA ST, 2L
COSTA MESA, CA 92627

Orange County (194) 972-2118

MS. RITA K NIJJAR PA-C

Dermatology

275 VICTORIA ST, SUITE 1H
COSTA MESA, CA 92627

Orange County (949) 646-2311

ALI ASGHAR BEHZADNIA MD FACP

Internal Medicine (Endocrinology, Diabetes & Metabolism)

275 VICTORIA ST, #2J
COSTA MESA, CA 92627

Orange County (949) 650-0630

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 Margaret Shannon's NPI number?

The NPI number for Margaret Shannon is 1265449441. It was assigned to this individual provider in the NPPES registry on August 1, 2006.

Where is Margaret Shannon located?

Margaret Shannon practices at 275 Victoria St Suite 1H, Costa Mesa, CA 92627. The listed phone number is (949) 646-2311.

What is Margaret Shannon's specialty?

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

Is Margaret Shannon enrolled in Medicare?

Yes. Margaret Shannon 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.

Does Margaret Shannon hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 05D0687205) is associated with this NPI, valid through August 31, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Margaret Shannon was last updated on August 5, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.