DR. ALEX JOHN MESSINA MD
NPI 1902867823
Internal Medicine in Santa Monica, CA

Q: What is Alex Messina's NPI number?

The NPI number for Alex Messina is 1902867823. It was assigned to this individual provider in the NPPES registry on March 30, 2006.

Q: What is Alex Messina's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Alex Messina was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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 March 30, 2006PECOS EnrolledAccepts Medicare AssignmentCLIA 05D0903446 · Waiver

2021 SANTA MONICA BLVD, #101E, SANTA MONICA, CA 90404(310) 453-1103(310) 453-9633 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 7, 2023, Jan 12, 2023 (2 updates tracked since 2023).

On this page

About Dr. Alex John Messina Md NPPES

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

DR. ALEX JOHN MESSINA MD (NPI 1902867823) is an individual internal medicine provider in Santa Monica, California, licensed in California (A23984) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS, holds a CLIA Waiver certificate valid through July 20, 2027, and is a graduate of Other (1965).

NPPES Registry Identity

NPI1902867823

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. ALEX JOHN MESSINACredential: MD

Location Address2021 SANTA MONICA BLVD, #101ESanta Monica, CA 90404

Mailing Address2021 Santa Monica Blvd, Ste 101eSanta Monica, CA 90404 · (310) 453-1103 · Fax (310) 453-9633

Phone(310) 453-1103

Fax(310) 453-9633

Sole ProprietorYes

Medical School CMSOtherGraduated 1965

Enumeration DateMarch 30, 2006

Last NPPES UpdateMarch 7, 20232 updates tracked since enumeration

NPPES CertifiedJanuary 12, 2023

✔ NPI 1902867823 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A23984

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

2021 SANTA MONICA BLVD, Santa Monica, CA 90404

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Other Identifiers 2

OtherA23984State License Number

Other952845053Fed Tax Id No

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. Alex John Messina 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 ID547310252

PECOS Enrollment IDI20090617000585

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 Waiver 05D0903446

Alex J Messina MD · Santa Monica, CA

Active · expires Jul 20, 2027

CLIA Number05D0903446

Laboratory TypePhysician Office

Certificate Effective DateJuly 21, 2025

Certificate Expiration DateJuly 20, 2027

Laboratory DirectorAlex J. Messina

Laboratory Phone(310) 453-1103

Laboratory LocationAlex J Messina MD2021 Santa Monica Boulevard #101e, Santa Monica, CA 90404

CLIA data matches this NPI record on: Address Phone

This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 3

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.

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.

36 services21 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

19 services18 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

15 services15 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90404 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

$142.39 typical visit price

range $62.96 – $187.60

Typical copayment $35.59 (range $15.74 – $46.90)

Most-billed visit code 99204

Established Patient

$109.96 typical visit price

range $20.84 – $153.61

Typical copayment $27.49 (range $5.21 – $38.40)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

AVA T SHAMBAN MD

Dermatology

2021 SANTA MONICA BLVD, SUITE 600E
SANTA MONICA, CA 90404

Los Angeles County (310) 828-2282

BELLA DOSHI

Dentist

2021 SANTA MONICA BLVD, SUITE 500E
SANTA MONICA, CA 90404

Los Angeles County (310) 828-3522

CRISTINA SHALLENBERGER N.P.

Nurse Practitioner (Family)

2021 SANTA MONICA BLVD, SUITE 600 EAST
SANTA MONICA, CA 90404

Los Angeles County (310) 828-2282

DR. JOAN KAREN FELTMAN M.D.

Internal Medicine

2021 SANTA MONICA BLVD, SUITE 710
SANTA MONICA, CA 90404

Los Angeles County (310) 315-0131

DR. THOMAS ALAN HANSCOM MD

Ophthalmology

2021 SANTA MONICA BLVD, SUITE # 720E
SANTA MONICA, CA 90404

Los Angeles County (310) 829-3303

KIMBERLY HAGEN TILLAR R.N.

Registered Nurse (Oncology)

2021 SANTA MONICA BLVD, SUIT 400E
SANTA MONICA, CA 90404

Los Angeles County (310) 453-5654

LAURIE REYNARD M.D.

Specialist

2021 SANTA MONICA BLVD, STE 730E
SANTA MONICA, CA 90404

Los Angeles County (310) 453-1266

CAROLINE MARIE COLIN M.D.

Obstetrics & Gynecology

2021 SANTA MONICA BLVD, SUITE 304E
SANTA MONICA, CA 90404

Los Angeles County (310) 829-0080

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 Alex Messina's NPI number?

The NPI number for Alex Messina is 1902867823. It was assigned to this individual provider in the NPPES registry on March 30, 2006.

Where is Alex Messina located?

Alex Messina practices at 2021 Santa Monica Blvd #101e, Santa Monica, CA 90404. The listed phone number is (310) 453-1103.

What is Alex Messina's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Alex Messina enrolled in Medicare?

Yes. Alex Messina 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 Alex Messina hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 05D0903446) is associated with this NPI, valid through July 20, 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 Alex Messina was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.