MARIA GHEE-MING TAN MD
NPI 1689666158
General Practice in Missouri City, TX

NPI Status: Active since August 19, 2005

Contact Information

4501 CARTWRIGHT RD
STE 604
MISSOURI CITY, TX
ZIP 77459
Phone: (281) 499-9606

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  • Individual
  • Female
  • Years of Experience 53
  • General Practice
  • May Accept Medicare Approved Payment
  • PECOS Enrolled
  • CLIA Number: 45D0871161
  • CLIA Cert. Type: Physician Office
  • CLIA Exp. Date: 08-31-2026

About MARIA TAN

This page provides the complete NPI Profile along with additional information for Maria Tan, a primary care provider established in Missouri City, Texas with a medical specialization in General Practice and more than 53 years of experience. The healthcare provider is registered in the NPI registry with number 1689666158 assigned on August 2005. The practitioner's primary taxonomy code is 208D00000X with license number F3356 (TX). The provider is registered as an individual and her NPI record was last updated 16 years ago.

NPI
1689666158
Provider Name
MARIA GHEE-MING TAN MD
Other Name
DR. MARIA TAN
Other Name Type
Other Name (5)
Gender
Female
Entity Type
Individual
Location Address
4501 CARTWRIGHT RD STE 604 MISSOURI CITY, TX 77459
Location Phone
(281) 499-9606
Mailing Address
PO BOX 454 MISSOURI CITY, TX 77459
Medical School Name
OTHER
Graduation Year
1973
Is Sole Proprietor?
Yes
Enumeration Date
08-19-2005
Last Update Date
03-31-2010
Code Navigator

A primary care provider (PCP) like Maria Tan sees people with common medical problems. The primary care provider might be a doctor, physician assistant, nurse practitioner or clinic that are usually involved in your long-term care. A PCP might provide preventive care, treat common medical conditions, identify urgent medical problems and refer you to specialists when necessary. Primary care is usually provided in an outpatient facility but if you are admitted to a hospital your PCP may assist in your care. The most common medical conditions seen by primary care providers are: hypertension, upper respiratory tract infections, depression or anxiety, back pain, arthritis, dermatitis, diabetes, urinary tract infections, etc

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

General Practice

Taxonomy Code
208D00000X
Type
Allopathic & Osteopathic Physicians
License No.
F3356
License State
TX
Taxonomy Description
A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1207Q00000XAllopathic & Osteopathic Physicians

Family Medicine

F3356 (TX)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
00G639MEDICARE ID-TYPE UNSPECIFIED (04)TX 
C22466MEDICARE UPIN (02) 

Medicare Participation & PECOS Enrollment Status

Maria Tan is registered with Medicare but maybe doesn't accept claims assignment. If you are a Medicare beneficiary call and confirm with the provider before seeking any services.

Maria Tan is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 5294850285

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20100914001035

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Maybe

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Provider Referred Orders for Durable Medical Equipment, Devices & Supplies

The following list reflects the services, supplies or durable medical equipment ordered by this provider to a DME supplier on behalf of patients. The information below is derived from Medicare claims data and reflects the BETOS category, HCPCS code information and the number times each service was submitted under the Medicare fee-for-service program.

Durable Medical Equipment

  • DME-Oxygen and Supplies (DC002N)

    Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate (HCPCS:E1390)

    1 DME suppliers used 12 Medicare Claims 12 Services Paid

  • DME-Oxygen and Supplies (DC002N)

    Portable oxygen concentrator, rental (HCPCS:E1392)

    1 DME suppliers used 12 Medicare Claims 12 Services Paid

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 66 times for 29 patients

Insertion of needle into vein for collection of blood sample

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.

This service was performed 44 times for 21 patients

CLIA Information

The Clinical Laboratory Improvement Amendments (CLIA) of 1988 applies to facilities or sites that test human specimens for health assessment or to diagnose, prevent, or treat disease. The CLIA Program sets standards for clinical laboratory testing and issues certificates. The NPI / CLIA crosswalk information for this NPI number is:

CLIA Number
45D0871161
Facility Type
Physician Office
Certificate Effective Date
September 01, 2024
Certificate Expiration Date
August 31, 2026
Laboratory Director
MARIA TAN
Certificate Type
Certificate of Waiver
Certificate Type Description
This CLIA certificate is issued to Maria Tan to perform only waived tests. CLIA defines waived tests as simple tests with a low risk for an incorrect result. Waived tests include certain tests listed in CLIA regulations, tests cleared by the FDA for home use and tests approved by the FDA for waived status and that meet CLIA waiver criteria.

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1689666158, we treat the final digit (8) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 62. The final step is to find the difference between that total and the next multiple of ten (70 - 62 = 8).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
6
Unchanged
Pos 3
8
Doubled → 16 → 1 + 6
Pos 4
9
Unchanged
Pos 5
6
Doubled → 12 → 1 + 2
Pos 6
6
Unchanged
Pos 7
6
Doubled → 12 → 1 + 2
Pos 8
1
Unchanged
Pos 9
5
Doubled → 10 → 1 + 0
Check
8
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 8 → 16 → 7 6 → 12 → 3 6 → 12 → 3 5 → 10 → 1

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 6 + 1 + 6 + 9 + 1 + 2 + 6 + 1 + 2 + 1 + 1 + 0 + 24 = 62

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 62 is 70. The difference is the calculated check digit.

70 - 62 = 8
This NPI is valid
The calculated check digit is 8, which matches the last digit of 1689666158.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Family Medicine
4501 CARTWRIGHT RD, STE 604
MISSOURI CITY, TX 77459
Podiatrist
4501 CARTWRIGHT RD, SUITE 208
MISSOURI CITY, TX 77459
Psychiatry & Neurology (Psychiatry)
4501 CARTWRIGHT RD, STE 103
MISSOURI CITY, TX 77459
Podiatrist
4501 CARTWRIGHT RD, STE 208
MISSOURI CITY, TX 77459
Hospice Care, Community Based
4501 CARTWRIGHT RD, SUITE#102
MISSOURI CITY, TX 77459
Clinic/Center (Sleep Disorder Diagnostic)
4501 CARTWRIGHT RD, SUITE 401
MISSOURI CITY, TX 77459
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459
Clinic/Center (Medical Specialty)
4501 CARTWRIGHT RD, SUITE 102
MISSOURI CITY, TX 77459
Psychiatry & Neurology (Child & Adolescent Psychiatry)
4501 CARTWRIGHT RD, SUITE 102
MISSOURI CITY, TX 77459
Counselor (Mental Health)
4501 CARTWRIGHT RD, SUITE 102
MISSOURI CITY, TX 77459
Clinical Nurse Specialist (Medical-Surgical)
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459
Physician Assistant (Surgical)
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459
Specialist
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459
Psychologist (Clinical)
4501 CARTWRIGHT RD, SUITE 705
MISSOURI CITY, TX 77459
Specialist/Technologist, Other (Electroneurodiagnostic)
4501 CARTWRIGHT RD, #304
MISSOURI CITY, TX 77459
Specialist
4501 CARTWRIGHT RD, SUITE 304
MISSOURI CITY, TX 77459
Psychologist (Clinical)
4501 CARTWRIGHT RD, STE 103
MISSOURI CITY, TX 77459
Registered Nurse (Registered Nurse First Assistant)
4501 CARTWRIGHT RD, SUITE 606
MISSOURI CITY, TX 77459

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1689666158, enumerated as an "individual" on August 19, 2005.

The provider is located at 4501 CARTWRIGHT RD STE 604 MISSOURI CITY, TX 77459 and the phone number is (281) 499-9606.

General Practice with taxonomy code 208D00000X.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to verify.