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DR. MARK JASON ALEXAKOS MD
NPI 1083719835
Psychiatry & Neurology - Child & Adolescent Psychiatry in Lynn, MA

Active since September 14, 2006PECOS EnrolledAccepts Medicare Assignment
20 CENTRAL AVE, 3RD FLOOR, LYNN, MA 01901(781) 596-2502(781) 598-8137 Get Directions Write a Review

NPPES record last updated: December 15, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 15, 2022, Feb 15, 2017 (2 updates tracked since 2017).

About Dr. Mark Jason Alexakos Md NPPES

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

DR. MARK JASON ALEXAKOS MD (NPI 1083719835) is an individual child & adolescent psychiatry provider in Lynn, Massachusetts, licensed in Massachusetts (152292) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Chicago, Pritzker School Of Medicine (1995).

NPPES Registry Identity

NPI1083719835
Entity TypeIndividualMale
Primary Taxonomy2084P0804X
Provider Legal NameDR. MARK JASON ALEXAKOSCredential: MD
Location Address20 CENTRAL AVE, 3RD FLOORLynn, MA 01901-1201
Mailing Address1441 Constitution Blvd Ste 200Salinas, CA 93906-3127 · (831) 796-1704 · Fax (781) 598-8137
Phone(781) 596-2502
Fax(781) 598-8137
Sole ProprietorNo
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 1995
Enumeration DateSeptember 14, 2006
Last NPPES UpdateDecember 15, 20222 updates tracked since enumeration
NPPES CertifiedDecember 15, 2022
✔ NPI 1083719835 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
License✔ Licensed in MA · 152292
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Also ListedPsychiatry & Neurology · PsychiatryTaxonomy 2084P0800X · License 152292 (MA)
20 CENTRAL AVE, Lynn, MA 01901
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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

Dr. Mark Jason Alexakos 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 ID3173681608
PECOS Enrollment IDI20181204001622
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

3

Medicare enrollment records show Mark Alexakos reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Lynn Community Health, Inc.
0.2 mi
Federally Qualified Health Center (FQHC)
269 UNION STREET
Lynn, MA 01901
  • Reassigned Medicare billing, Massachusetts enrollment
  • 178 clinicians in this Medicare group
NPI 1013997691 (781) 596-2502
County Of Monterey Behavioral Health
2,683 mi
Community/Behavioral Health
200 BROADWAY ST, SUITE 88
King City, CA 93930
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: County Of Monterey
  • 107 clinicians in this Medicare group
NPI 1306033220 (831) 386-6868
Interim, Inc.
2,687 mi
Community/Behavioral Health
2149 H DELA ROSA SR ST STE 203
Soledad, CA 93960
  • Reassigned Medicare billing, California enrollment
  • 13 clinicians in this Medicare group
NPI 1255107041 (831) 649-4522

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 2

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 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.
48 services17 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.
27 services14 patients

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.

MRS. MELANIE C BLOUNT PSY.D
Psychologist (Clinical)
20 CENTRAL AVE, 3RD FLOOR- BEHAVIORAL HEALTH
LYNN, MA 01901
Essex County (781) 715-6223
SELENA ZHAN OD
Optometrist
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 595-1350
LAURA JEAN COUILLARD RN
Registered Nurse
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 581-3900
MRS. MAYLENE VICTORIA COLLADO-WULFF LICSW
Social Worker (Clinical)
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 586-6691
SAIDA AITBOUALI
Counselor (Mental Health)
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 477-7222
BENJAMIN RAPHAEL STRAKE OD
Optometrist
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 595-1350
MS. HANNAH MICHELLE MAWHORTER
Social Worker
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 477-7222
MS. ANNA THERESA MCNICHOLAS RN
Registered Nurse
20 CENTRAL AVE
LYNN, MA 01901
Essex County (781) 596-2502

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 Mark Alexakos's NPI number?

The NPI number for Mark Alexakos is 1083719835. It was assigned to this individual provider in the NPPES registry on September 14, 2006.

Where is Mark Alexakos located?

Mark Alexakos practices at 20 Central Ave 3rd Floor, Lynn, MA 01901. The listed phone number is (781) 596-2502.

What is Mark Alexakos's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Mark Alexakos enrolled in Medicare?

Yes. Mark Alexakos 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 Mark Alexakos's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Alexakos reassigns Medicare benefits to 3 organizations: Lynn Community Health, Inc. (Lynn, MA), County Of Monterey Behavioral Health (King City, CA) and Interim, Inc. (Soledad, 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 Mark Alexakos'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 Mark Alexakos was last updated on December 15, 2022. 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.