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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. DAVID MICHAEL WASHINGTON MD MSC
NPI 1851684955
Internal Medicine in Houston, TX

Active since May 23, 2011Opted out of Medicare · through Oct 1, 2028
18333 EGRET BAY BLVD STE 111, HOUSTON, TX 77058(281) 915-9860(346) 248-8022 Get Directions Write a Review

NPPES record last updated: October 3, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Oct 3, 2026, May 10, 2025, Jul 21, 2022 and 3 more (6 updates tracked since 2016).

About Dr. David Michael Washington Md Msc NPPES

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

DR. DAVID MICHAEL WASHINGTON MD MSC (NPI 1851684955) is an individual internal medicine provider in Houston, Texas, licensed in Texas (R1149) and active in the NPI registry since May 2011. He has opted out of Medicare through October 1, 2028 and remains eligible to order and refer, is affiliated with Memorial Hermann Hospital System, and is a graduate of Warren Alpert Medical School Of Brown University (2011).

NPPES Registry Identity

NPI1851684955
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DAVID MICHAEL WASHINGTONCredential: MD MSC
Location Address18333 EGRET BAY BLVD STE 111Houston, TX 77058-3200
Mailing Address18333 Egret Bay Blvd Ste 111Houston, TX 77058-3200 · (281) 915-9860 · Fax (346) 248-8022
Phone(281) 915-9860
Fax(346) 248-8022
Sole ProprietorNo
Medical School CMSWarren Alpert Medical School Of Brown UniversityGraduated 2011
Enumeration DateMay 23, 2011
Last NPPES UpdateOctober 3, 20266 updates tracked since enumeration
NPPES CertifiedOctober 3, 2026
✔ NPI 1851684955 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in TX · R1149✔ Licensed in MA · 261784✔ Licensed in CA · C204123
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.
Also ListedPediatricsTaxonomy 208000000X · License C204123 (CA), 261784 (MA), R1149 (TX)
18333 EGRET BAY BLVD STE 111, Houston, TX 77058
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. David Michael Washington Md Msc has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from October 1, 2026 through October 1, 2028.

Opt-Out Effective DateOctober 1, 2026
Opt-Out In Effect ThroughOctober 1, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Areas of Expertise CMS Part B claims 9

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.
247 services165 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
134 services134 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.
96 services70 patients
Online digital evaluation and management service for an established patient for up to 7 days, total time 5-10 minutes 99421
This service involves a week-long digital assessment of your health status. It's conducted online by your healthcare provider, focusing on managing your existing health condition. The process takes 5-10 minutes of your time daily, ensuring optimal health management.
46 services34 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
36 services35 patients
Administration of influenza virus vaccine G0008
The administration of the influenza virus vaccine, also known as the flu shot, is a simple procedure to protect against the flu. A healthcare provider injects a small dose of the vaccine into your arm. This stimulates your immune system to produce antibodies, which will help your body fight off the flu if exposed.
36 services35 patients

Hospital Affiliations CMS Care Compare 3

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

Memorial Hermann Hospital System

Acute Care Hospitals · Houston, TX
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450184
Location1635 North Loop WestHouston, TX 77008 · Harris County
Emergency services Birthing friendly

Houston Methodist Hospital

Acute Care Hospitals · Houston, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450358
Location6565 FanninHouston, TX 77030 · Harris County
Emergency services Birthing friendly

Houston Methodist Clear Lake Hospital

Acute Care Hospitals · Nassau Bay, TX
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number450709
Location18300 Houston Methodist DrNassau Bay, TX 77058 · Harris County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 77058 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
$134.06 typical visit price
range $58.24 – $176.98
Typical copayment $33.51 (range $14.56 – $44.24)
Most-billed visit code 99204
Established Patient
$102.71 typical visit price
range $18.60 – $143.93
Typical copayment $25.67 (range $4.65 – $35.98)
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.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
5 suppliers13 claims22 services$6.27 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
4 suppliers21 claims21 services$182.14 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES

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

THROUGH TIME PRIMARY CARE PLLC
Clinic/Center (Multi-Specialty)
18333 EGRET BAY BLVD STE 111
HOUSTON, TX 77058
Harris County (401) 932-7605

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 David Washington's NPI number?

The NPI number for David Washington is 1851684955. It was assigned to this individual provider in the NPPES registry on May 23, 2011.

Where is David Washington located?

David Washington practices at 18333 Egret Bay Blvd Ste 111, Houston, TX 77058. The listed phone number is (281) 915-9860.

What is David Washington's specialty?

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

Is David Washington enrolled in Medicare?

No. David Washington has opted out of Medicare through October 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

Is David Washington affiliated with any hospitals?

According to CMS data, David Washington is affiliated with Memorial Hermann Hospital System, Houston Methodist Hospital and Houston Methodist Clear Lake Hospital.

When was this NPI record last updated?

The NPPES record for David Washington was last updated on October 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 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.