Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

LYDIA K. REX MD
NPI 1275159071
Family Medicine in Needham, MA

Active since June 18, 2020PECOS Enrolled
145 ROSEMARY STREET, SUITE C, NEEDHAM, MA 02494(781) 235-7900(781) 237-9930 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 13, 2026, Jun 29, 2020, Jun 18, 2020 (3 updates tracked since 2020).

About Lydia K. Rex Md NPPES

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

LYDIA K. REX MD (NPI 1275159071) is an individual family medicine provider in Needham, Massachusetts, licensed in Massachusetts (1019363) and active in the NPI registry since June 2020. She is enrolled in Medicare PECOS, is affiliated with Lawrence General Hospital, and is a graduate of Tufts University School Of Medicine (2020).

NPPES Registry Identity

NPI1275159071
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameLYDIA K. REXCredential: MD
Location Address145 ROSEMARY STREET, SUITE CNeedham, MA 02494-3259
Mailing Address145 Rosemary Street, Suite CNeedham, MA 02494-3259 · (781) 235-7900 · Fax (781) 237-9930
Fax(781) 237-9930
Sole ProprietorNo
Medical School CMSTufts University School Of MedicineGraduated 2020
Enumeration DateJune 18, 2020
Last NPPES UpdateJuly 13, 20263 updates tracked since enumeration
NPPES CertifiedJuly 13, 2026
NPI 1275159071 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses Licensed in MA · 1019363 Licensed in MA · 285361
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
145 ROSEMARY STREET, Needham, MA 02494

Other Identifiers 1

Medicaid110163441AMA

Accepted Insurance

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

Lydia K. Rex 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 ID2860819034
PECOS Enrollment IDI20240718003464
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 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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
26 services14 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
19 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Lawrence General Hospital

Acute Care Hospitals · Lawrence, MA
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220010
LocationOne General StreetLawrence, MA 01842 · Essex County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02494 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
$97.64 typical visit price
range $63.72 – $189.86
Typical copayment $24.41 (range $15.93 – $47.46)
Most-billed visit code 99203
Established Patient
$111.18 typical visit price
range $21.07 – $155.29
Typical copayment $27.79 (range $5.26 – $38.82)
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 18

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

Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494
Family Medicine
145 ROSEMARY STREET, SUITE C
NEEDHAM, MA 02494

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 Lydia Rex's NPI number?

The NPI number for Lydia Rex is 1275159071. It was assigned to this individual provider in the NPPES registry on June 18, 2020.

Where is Lydia Rex located?

Lydia Rex practices at 145 Rosemary Street Suite C, Needham, MA 02494. The listed phone number is (781) 235-7900.

What is Lydia Rex's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Lydia Rex enrolled in Medicare?

Yes. Lydia Rex 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.

What insurance does Lydia Rex accept?

Health plans from Anthem Blue Cross and Blue Shield list Lydia Rex as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Lydia Rex affiliated with any hospitals?

According to CMS data, Lydia Rex is affiliated with Lawrence General Hospital.

When was this NPI record last updated?

The NPPES record for Lydia Rex was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days 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.