ALYSSA MARIE GROSSEN MD
NPI 1912498411
Internal Medicine - Gastroenterology in New Haven, CT
Quality Rating: 76.47 out of 100 score
NPI Status: Active since May 21, 2018
- Individual
- Female
- Years of Experience 8
- Internal Medicine
- Gastroenterology
- May Accept Medicare Approved Payment
- PECOS Enrolled
About ALYSSA GROSSEN
This page provides the complete NPI Profile along with additional information for Alyssa Grossen, an internist established in New Haven, Connecticut with a medical specialization in Internal Medicine, focusing in gastroenterology and more than 8 years of experience. She graduated from University Of Oklahoma College Of Medicine in 2018. The healthcare provider is registered in the NPI registry with number 1912498411 assigned on May 2018. The practitioner's primary taxonomy code is 207RG0100X with license number 80523 (CT). The provider is registered as an individual and her NPI record was last updated April 2025.
- NPI
- 1912498411
- Provider Name
- ALYSSA MARIE GROSSEN MD
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 20 YORK ST NEW HAVEN, CT 06510
- Location Phone
- (203) 688-4242
- Mailing Address
- 20 YORK ST NEW HAVEN, CT 06510
- Mailing Phone
- (405) 213-7066
- Medical School Name
- UNIVERSITY OF OKLAHOMA COLLEGE OF MEDICINE
- Graduation Year
- 2018
- Is Sole Proprietor?
- No
- Enumeration Date
- 05-21-2018
- Last Update Date
- 04-08-2025
- Code Navigator
An internist like Alyssa Grossen is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, 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
Internal Medicine Gastroenterology
- Taxonomy Code
- 207RG0100X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 80523
- License State
- CT
- Taxonomy Description
- An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
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) |
---|---|---|---|---|
1 | 390200000X | Student, Health Care | Student in an Organized Health Care Education/Training Program |
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 |
---|---|---|---|
207R00000X | MEDICAID (05) | OK |
Medicare Participation & PECOS Enrollment Status
Alyssa Grossen 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.
Alyssa Grossen 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: 7113257478
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: I20250522003331
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
Physician Visit Costs
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 06510 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $138.84
- Minimum New Patient Price $60.82
- Maximum New Patient Price $183.1
- Average New Patient Copayment $34.71
- Minimum New Patient Copayment $15.2
- Maximum New Patient Copayment $45.77
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $106.68
- Minimum Established Patient Price $19.76
- Maximum Established Patient Price $149.26
- Average Established Patient Copayment $26.67
- Minimum Established Patient Copayment $4.94
- Maximum Established Patient Copayment $37.31
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
Overall MIPS Quality Performance
The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 76.47, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.
The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.
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Final Score: 76.47 out of 100
The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.
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Quality Score: 72.32
The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.
There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.
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Promoting Interoperability Score: N/A
The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.
The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data. -
Improvement Activities Score: 40
The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.
The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores. -
Cost Score: N/A
The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.
Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores. -
Cost Score: N/A
The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.
Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.
Reviews for ALYSSA MARIE GROSSEN MD
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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 | 9 | 1 | 2 | 4 | 9 | 8 | 4 | 1 | 1 |
Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
2 | 9 | 2 | 2 | 8 | 9 | 16 | 4 | 2 | |
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
2 + 9 + 2 + 2 + 8 + 9 + 1 + 6 + 4 + 2 + 24 = 69 | |||||||||
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
70 - 69 = 1 | 1 |
The NPI number 1912498411 is valid because the calculated check digit 1 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 20 providers are registered at the same or nearby location.
NPI | Name / Type | Taxonomy | Address |
---|---|---|---|
1265437024 | MELIH ARICI MD Individual | Radiology (Diagnostic Radiology) | 20 YORK ST YALE NEW HAVEN HOSPITAL NEW HAVEN, CT 06510 (203) 785-7998 |
1770571440 | DAVID CHRISTOPHER CONE MD Individual | Emergency Medicine | 20 YORK ST YNHH SOUTH PAVILION 218 NEW HAVEN, CT 06510 (203) 688-2222 |
1487642153 | KEVIN JOHN BURNS PA C Individual | Physician Assistant | 20 YORK ST YALE NEW HAVEN HOSPITAL SOUTH PAVILION 218 NEW HAVEN, CT 06510 (203) 688-2222 |
1992793186 | MAURICE J MAHONEY MD Individual | Medical Genetics (Clinical Genetics (M.D.)) | 20 YORK ST YALE CHILDREN'S HOSPITAL, WEST PAVILION, 2ND FLOOR NEW HAVEN, CT 06510 (203) 785-2660 |
1144218207 | MARGRETTA R SEASHORE MD Individual | Medical Genetics (Clinical Genetics (M.D.)) | 20 YORK ST CHILDREN'S HOSPITAL AT YALE, WEST PAVILION, 2ND FLOOR NEW HAVEN, CT 06510 (203) 785-2660 |
1689662686 | PAUL HENRI DESAN MD Individual | Psychiatry & Neurology (Psychiatry) | 20 YORK ST NEW HAVEN, CT 06510 (203) 688-2619 |
1073501995 | LIVA ANDREJEVA-WRIGHT MD Individual | Radiology (Diagnostic Radiology) | 20 YORK ST YALE NEW HAVEN HOSPITAL-SOUTH PAVILLION-2ND FL NEW HAVEN, CT 06510 (203) 688-2433 |
1356330104 | LAURA JEAN BONTEMPO MD Individual | Emergency Medicine | 20 YORK ST YALE-NEW HAVEN CHILDREN'S HOSPITAL-SP 218 NEW HAVEN, CT 06510 (203) 688-2222 |
1285623082 | KELLY ANNETTE MARTENS PA C Individual | Physician Assistant | 20 YORK ST YALE NEW HAVEN HOSPTIAL EMERGENCY DEPARTMENT NEW HAVEN, CT 06510 (203) 688-2222 |
1528057155 | CARLO BRUNO BIFULCO MD Individual | Pathology (Anatomic Pathology) | 20 YORK ST YALE-NEW HAVEN CHILDREN'S HOSPITAL-EP 2608 NEW HAVEN, CT 06510 (203) 785-3624 |
1336138098 | KAREN JEAN JUBANYIK-BARBER MD Individual | Emergency Medicine | 20 YORK ST YNHH SOUTH PAVILION 218 NEW HAVEN, CT 06510 (203) 688-2222 |
1558350199 | RISA HILLARY KENT MD Individual | Radiology (Diagnostic Radiology) | 20 YORK ST YALE NEW HAVEN HOSPITAL SOUTH PAVILION 2ND FLOOR NEW HAVEN, CT 06510 (203) 688-2433 |
1194714519 | RICHARD TORRES MD Individual | Pathology (Hematology) | 20 YORK ST YNHH, CLINIC BUILDING, ROOM 407 NEW HAVEN, CT 06510 (203) 785-2153 |
1326038860 | HARRY C MOSCOVITZ MD Individual | Emergency Medicine | 20 YORK ST YNHH SOUTH PAVILION - ROOM 218 NEW HAVEN, CT 06510 (203) 688-2222 |
1568452969 | JOHN E ARUNY MD Individual | Radiology (Vascular & Interventional Radiology) | 20 YORK ST YNHH SOUTH PAVILION - 2ND FLOOR NEW HAVEN, CT 06510 (203) 688-2433 |
1699765990 | ELIZABETH DOLORES BROWNE PAC Individual | Physician Assistant | 20 YORK ST YALE NEW HAVEN HOSPITAL NEW HAVEN, CT 06510 (203) 688-2222 |
1134110158 | MANJU L PRASAD M.D. Individual | Pathology (Anatomic Pathology) | 20 YORK ST EP#2-608B NEW HAVEN, CT 06510 (203) 737-4862 |
1801887203 | MICHAEL EDWIN HODSDON MD Individual | Pathology (Clinical Pathology/Laboratory Medicine) | 20 YORK ST YNHH CB 407 NEW HAVEN, CT 06510 (203) 785-2153 |
1992796387 | MARK J SHLOMCHIK MD Individual | Pathology (Clinical Pathology/Laboratory Medicine) | 20 YORK ST YNHH, CLINIC BUILDING, ROOM 407 NEW HAVEN, CT 06510 (203) 785-2153 |
1508857913 | HENRY M RINDER MD Individual | Pathology (Clinical Pathology/Laboratory Medicine) | 20 YORK ST YNHH - CLINIC BUILDING, ROOM 407 NEW HAVEN, CT 06510 (203) 785-2153 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1912498411, enumerated in the NPI registry as an "individual" on May 21, 2018
The provider is located at 20 York St New Haven, Ct 06510 and the phone number is (203) 688-4242
The provider's speciality is Internal Medicine with taxonomy code 207RG0100X with a focus in Gastroenterology
The provider has more than 8 years of experience. She graduated from University Of Oklahoma College Of Medicine in 2018.
The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.
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.
Medicare beneficiaries should expect a typical cost of $138.84 with an average copayment of $34.71 for new patient appointments. Established patients should expect a typical charge of $106.68 and an average copayment of 26.67. Please review your insurance plan or contact the provider directly to determine your specific costs.
This NPI record was last updated on May 21, 2018. 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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