DR. MARY ERTLSCHWEIGER GEIGER M.D.
NPI 1649476607
Psychiatry & Neurology - Child & Adolescent Psychiatry in Gladwyne, PA
NPI Status: Active since June 26, 2007
Contact Information
205 MAPLE HILL RD
GLADWYNE, PA
ZIP 19035
Phone: (610) 896-5447
Fax: (610) 896-6649
- Individual
- Female
- Psychiatry & Neurology
- Child & Adolescent Psychiatry
- PECOS Enrolled
- Opted-Out Medicare
About MARY GEIGER
This page provides the complete NPI Profile along with additional information for Mary Geiger, a provider established in Gladwyne, Pennsylvania with a medical specialization in Psychiatry & Neurology, focusing in child & adolescent psychiatry . The healthcare provider is registered in the NPI registry with number 1649476607 assigned on June 2007. The practitioner's primary taxonomy code is 2084P0804X with license number MD009086E (PA). The provider is registered as an individual and her NPI record was last updated 18 years ago.
- NPI
- 1649476607
- Provider Name
- DR. MARY ERTLSCHWEIGER GEIGER M.D.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 205 MAPLE HILL RD GLADWYNE, PA 19035
- Location Phone
- (610) 896-5447
- Location Fax
- (610) 896-6649
- Mailing Address
- 205 MAPLE HILL RD GLADWYNE, PA 19035
- Mailing Phone
- (610) 896-5447
- Mailing Fax
- (610) 896-6649
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 06-26-2007
- Last Update Date
- 07-08-2007
- Code Navigator
The provider doesn't accept Medicare and has signed an affidavit to be excluded from the Medicare program. If you are a Medicare beneficiary this means a provider can charge whatever they want for services rendered but must follow certain rules to do so. Mary Geiger opted out of Medicare effective on 01-15-2016 until 01-15-2026. Opt out periods last for two years and cannot be terminated unless the provider is opting out for the very first time and the affidavit is terminated no later than 90 days after the opt out effective date. Opt-out affidavits might renew automatically renew every two years. The provider opted out of Medicare but is permitted to order and refer services to other healthcare providers.
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
Psychiatry & Neurology Child & Adolescent Psychiatry
- Taxonomy Code
- 2084P0804X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- MD009086E
- License State
- PA
- Taxonomy Description
- 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.
Medicare Participation & PECOS Enrollment Status
Mary Geiger 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
Opted-Out of Medicare? Yes
Opt-Out Effective Date: 01-15-2016
Opt-Out End Date: 01-15-2026
Eligible to Order and Refer? Yes
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
Reviews for DR. MARY ERTLSCHWEIGER GEIGER M.D.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 6 | 4 | 9 | 4 | 7 | 6 | 6 | 0 | 7 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 6 | 8 | 9 | 8 | 7 | 12 | 6 | 0 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 6 + 8 + 9 + 8 + 7 + 1 + 2 + 6 + 0 + 24 = 73 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 80 - 73 = 7 | 7 | ||||||||
The NPI number 1649476607 is valid because the calculated check digit 7 using the Luhn validation algorithm matches the last digit of the original NPI number.
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1649476607, enumerated in the NPI registry as an "individual" on June 26, 2007
The provider is located at 205 Maple Hill Rd Gladwyne, Pa 19035 and the phone number is (610) 896-5447
The provider's speciality is Psychiatry & Neurology with taxonomy code 2084P0804X with a focus in Child & Adolescent Psychiatry
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary 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.
No, the provider signed an affidavit on January 15, 2016 to opt-out of the Medicare program. The provider is excluded from the Medicare program until January 15, 2026.
This NPI record was last updated on June 26, 2007. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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