TAMMI THOMAS HOWARD MD
NPI 1114189560
Internal Medicine in Largo, MD

Active since June 26, 2008PECOS EnrolledAccepts Medicare Assignment
1221 MERCANTILE LN, LARGO, MD 20774(301) 618-5500 Get Directions Write a Review

NPPES record last updated: March 17, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Mar 17, 2026, Mar 17, 2025, Mar 17, 2018 and 1 more (4 updates tracked since 2017).

About Tammi Thomas Howard Md NPPES

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

TAMMI THOMAS HOWARD MD (NPI 1114189560) is an individual internal medicine provider in Largo, Maryland, licensed in Maryland (D0097826) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS, maintains a secondary practice location in Rochester, and is a graduate of Ohio State University College Of Medicine (2008).

NPPES Registry Identity

NPI1114189560
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameTAMMI THOMAS HOWARDCredential: MD
Location Address1221 MERCANTILE LNLargo, MD 20774-5374
Mailing Address130 Sutter St Fl 2San Francisco, CA 94104-4009 · (415) 658-6791 · Fax (415) 520-0904
Sole ProprietorNo
Medical School CMSOhio State University College Of MedicineGraduated 2008
Enumeration DateJune 26, 2008
Last NPPES UpdateMarch 17, 20264 updates tracked since enumeration
NPPES CertifiedMarch 17, 2026
NPI 1114189560 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses Licensed in MD · D0097826 Licensed in DC · MD045398 Licensed in OH · 35-097267 Licensed in MN · D974006118320
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.

1221 MERCANTILE LN, Largo, MD 20774

Other Names 1

Former Name (1)Tammi T Thomas

Secondary Practice Location 1

Location 1200 1st St SWRochester, MN 55905-0001 · Phone (507) 284-2511

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

Tammi Thomas Howard 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 ID7810175676
PECOS Enrollment IDI20171013002261
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 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.
55 services26 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.
43 services25 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
29 services26 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20774 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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.

Psychiatry & Neurology (Psychiatry)
1221 MERCANTILE LN
LARGO, MD 20774
Anesthesiology
1221 MERCANTILE LN
UPPER MARLBORO, MD 20774
Internal Medicine
1221 MERCANTILE LN, KAISER PERMANENTE LARGO MEDICAL CENTER
LARGO, MD 20774
Obstetrics & Gynecology (Maternal & Fetal Medicine)
1221 MERCANTILE LN, DEPT OF OBGYN
LARGO, MD 20774
Anesthesiology
1221 MERCANTILE LN
UPPER MARLBORO, MD 20774
Physician Assistant
1221 MERCANTILE LN, KAISER PERMANENTE LARGO MEDICAL CENTER
LARGO, MD 20774
Urology
1221 MERCANTILE LN, KAISER PERMANENTE DEPARTMENT OF UROLOGY
LARGO, MD 20774
Obstetrics & Gynecology
1221 MERCANTILE LN
UPPER MARLBORO, MD 20774

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 Tammi Howard's NPI number?

The NPI number for Tammi Howard is 1114189560. It was assigned to this individual provider in the NPPES registry on June 26, 2008. The provider is also known as Tammi T Thomas.

Where is Tammi Howard located?

Tammi Howard practices at 1221 Mercantile Ln, Largo, MD 20774. The listed phone number is (301) 618-5500.

What is Tammi Howard's specialty?

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

Is Tammi Howard enrolled in Medicare?

Yes. Tammi Howard 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.

When was this NPI record last updated?

The NPPES record for Tammi Howard was last updated on March 17, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.