DR. SHIRLEY PAK SO M.D.
NPI 1639466592
Internal Medicine - Geriatric Medicine in Worcester, MA
NPI Status: Active since June 29, 2011
Contact Information
291 LINCOLN ST
WORCESTER, MA
ZIP 01605
Phone: (508) 334-6251
Fax: (508) 334-6906
- Individual
- Female
- Years of Experience 22
- Internal Medicine
- Geriatric Medicine
- Accepts Insurance
- Accepts Medicare Approved Payment
- PECOS Enrolled
About SHIRLEY SO
This page provides the complete NPI Profile along with additional information for Shirley So, an internist established in Worcester, Massachusetts with a medical specialization in Internal Medicine, focusing in geriatric medicine and more than 22 years of experience. The healthcare provider is registered in the NPI registry with number 1639466592 assigned on June 2011. The practitioner's primary taxonomy code is 207RG0300X with license number 249041 (MA). The provider is registered as an individual and her NPI record was last updated 3 years ago.
- NPI
- 1639466592
- Provider Name
- DR. SHIRLEY PAK SO M.D.
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 291 LINCOLN ST WORCESTER, MA 01605
- Location Phone
- (508) 334-6251
- Location Fax
- (508) 334-6906
- Mailing Address
- PO BOX 415348 BOSTON, MA 02241
- Mailing Phone
- (800) 225-8885
- Mailing Fax
- (508) 334-6906
- Medical School Name
- OTHER
- Graduation Year
- 2004
- Is Sole Proprietor?
- No
- Enumeration Date
- 06-29-2011
- Last Update Date
- 05-01-2022
- Code Navigator
An internist like Shirley So 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 Geriatric Medicine
- Taxonomy Code
- 207RG0300X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 249041
- License State
- MA
- Taxonomy Description
- An internist who has special knowledge of the aging process and special skills in the diagnostic, therapeutic, preventive and rehabilitative aspects of illness in the elderly. This specialist cares for geriatric patients in the patient's home, the office, long-term care settings such as nursing homes and the hospital.
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Anthem Bronze Access Blue New England HMO 5000/10%/8000 w/HSA - HMO
- Anthem Bronze Access Blue New England HMO 5000/20%/8000 w/HSA - HMO
- Anthem Bronze Access Blue New England HMO 6500/30%/9200 Value - HMO
- Anthem Bronze Access Blue New England HMO 7000/50%/8000 w/HSA - HMO
- Anthem Bronze Access Blue New England HMO 8500/50%/9200 - HMO
- Anthem Gold Access Blue New England HMO 1000/20%/7500 - HMO
- Anthem Gold Access Blue New England HMO 2000/0%/6500 RxD - HMO
- Anthem Gold Access Blue New England HMO 2000/10%/4600 w/HSA - HMO
- Anthem Gold Access Blue New England HMO 2000/10%/7500 - HMO
- Anthem Gold Access Blue New England HMO 2000/20%/4600 w/HSA - HMO
- Anthem Gold Access Blue New England HMO 3000/0%/5500 RxD - HMO
- Anthem Gold Access Blue New England HMO 500/25%/7000 - HMO
- Anthem Platinum Access Blue New England HMO 250/10%/3500 - HMO
- Anthem Silver Access Blue New England HMO 2000/30%/9000 Value - HMO
- Anthem Silver Access Blue New England HMO 3000/20%/8500 - HMO
- Anthem Silver Access Blue New England HMO 3000/30%/9000 Value - HMO
- Anthem Silver Access Blue New England HMO 3500/20%/7250 w/HSA - HMO
- Anthem Silver Access Blue New England HMO 4000/0%/8500 - HMO
- Anthem Silver Access Blue New England HMO 4000/0%/8500 RxD - HMO
- Anthem Silver Access Blue New England HMO 4000/10%/7250 w/HSA - HMO
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Medicare Participation & PECOS Enrollment Status
Shirley So is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.
Shirley So 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: 7113198243
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: I20110922000164
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? Yes
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
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.
Extended inpatient or observation hospital service, first hour
Extended inpatient or observation hospital service, first hour
Follow-up nursing facility visit per day, typically 10 minutes
Follow-up nursing facility visit per day, typically 15 minutes
Follow-up nursing facility visit per day, typically 15 minutes
Follow-up nursing facility visit per day, typically 25 minutes
Follow-up nursing facility visit per day, typically 25 minutes
Follow-up nursing facility visit per day, typically 35 minutes
Follow-up nursing facility visit per day, typically 35 minutes
Initial nursing facility visit per day, typically 45 minutes
Nursing facility discharge management, more than 30 minutes
This service involves staying in the hospital for a longer period for close monitoring or treatment. During the first hour, medical staff observe your health status, administer necessary treatments, and ensure your comfort and safety. It's part of ensuring optimal care.
This service was performed 13 times for 12 patientsThis service involves staying in the hospital for a longer period for close monitoring or treatment. During the first hour, medical staff observe your health status, administer necessary treatments, and ensure your comfort and safety. It's part of ensuring optimal care.
This service was performed 12 times for 12 patientsA follow-up nursing facility visit per day typically lasts about 10 minutes. This service involves a healthcare professional checking on your health status, answering any questions you may have, and monitoring your progress. This routine check ensures your recovery is on track and any concerns are addressed promptly.
This service was performed 12 times for 11 patientsA follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
This service was performed 21 times for 16 patientsA follow-up nursing facility visit per day is a daily check-up service provided by healthcare professionals. It lasts around 15 minutes and involves assessing your health status, monitoring your recovery progress, and addressing any concerns you may have about your health or treatment.
This service was performed 113 times for 50 patientsA follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
This service was performed 73 times for 34 patientsA follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.
This service was performed 170 times for 67 patientsA follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
This service was performed 69 times for 32 patientsA follow-up nursing facility visit is a routine check-up that typically lasts about 35 minutes. During this visit, your health status is evaluated, any changes in your condition are noted, and necessary adjustments to your care plan are made. It's an essential part of maintaining your health.
This service was performed 84 times for 54 patientsAn initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.
This service was performed 37 times for 37 patientsNursing facility discharge management over 30 minutes is a comprehensive process where a healthcare team prepares you for leaving the facility. It involves creating a tailored plan, coordinating care, and ensuring a smooth transition to your next care setting.
This service was performed 18 times for 15 patientsPhysician Visit Costs
The typical physician office visit costs for Medicare beneficiaries in this area are: $44.34 for a new patient copayment and $25.87 for an established patient copayment.
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 01605 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99205
- Average New Patient Price $177.36
- Minimum New Patient Price $58.86
- Maximum New Patient Price $177.36
- Average New Patient Copayment $44.34
- Minimum New Patient Copayment $14.71
- Maximum New Patient Copayment $44.34
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $103.48
- Minimum Established Patient Price $19.11
- Maximum Established Patient Price $144.84
- Average Established Patient Copayment $25.87
- Minimum Established Patient Copayment $4.77
- Maximum Established Patient Copayment $36.21
* 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.
Reviews for DR. SHIRLEY PAK SO M.D.
There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.
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 | 3 | 9 | 4 | 6 | 6 | 5 | 9 | 2 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 6 | 6 | 9 | 8 | 6 | 12 | 5 | 18 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 6 + 6 + 9 + 8 + 6 + 1 + 2 + 5 + 1 + 8 + 24 = 78 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 80 - 78 = 2 | 2 | ||||||||
The NPI number 1639466592 is valid because the calculated check digit 2 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 |
|---|---|---|---|
| 1245214428 | DR. EASTER CHIU M.D. Individual | Pediatrics | 291 LINCOLN ST SUITE 101 WORCESTER, MA 01605 (508) 752-7888 |
| 1700981594 | DON PAUL DEPREZ M.D. Individual | Obstetrics & Gynecology | 291 LINCOLN ST SUITE 300 WORCESTER, MA 01605 (508) 799-0010 |
| 1164514048 | HAHNEMANN UROLOGY ASSOCIATES, INC. Organization | Urology | 291 LINCOLN ST SUITE 201 WORCESTER, MA 01605 (508) 755-8663 |
| 1225255896 | EMILY MICHELLE HOADLEY DPT Individual | Physical Therapist | 291 LINCOLN ST WORCESTER, MA 01605 (508) 753-2967 |
| 1083829014 | MS. TRACY M. CORMIER NP Individual | Nurse Practitioner | 291 LINCOLN ST EMPLOYEE HEALTH WORCESTER, MA 01605 (508) 793-6400 |
| 1659543486 | HELEN CARTER, M.D. Organization | Internal Medicine | 291 LINCOLN ST SUITE 200 WORCESTER, MA 01605 (508) 797-1300 |
| 1356432603 | SUBHASH C. GULATI, MD , FACS INC Organization | Surgery | 291 LINCOLN ST SUITE 204 WORCESTER, MA 01605 (508) 755-0770 |
| 1598707374 | MR. MICHAEL SMITH LICSW Individual | Social Worker (Clinical) | 291 LINCOLN ST WORCESTER, MA 01605 (508) 334-3240 |
| 1174687289 | JAMES P HUGHES MD PC Organization | Otolaryngology | 291 LINCOLN ST WORCESTER, MA 01605 (508) 752-3439 |
| 1336351501 | PAIN MANAGEMENT & SPINAL CARE, LLC Organization | Chiropractor | 291 LINCOLN ST STE. 100 WORCESTER, MA 01605 (508) 795-1810 |
| 1699746024 | PAULA B BELLIN M.D. Individual | Urology | 291 LINCOLN ST SUITE 201 WORCESTER, MA 01605 (508) 755-8663 |
| 1558334045 | STEPHEN E. TOSI M.D. Individual | Urology | 291 LINCOLN ST SUITE 201 WORCESTER, MA 01605 (508) 755-8663 |
| 1528041423 | DR. JAYANTHI KUMAR M.D. Individual | Internal Medicine | 291 LINCOLN ST WORCESTER, MA 01605 (508) 752-7464 |
| 1710962154 | RONALD B CRUZ MD Individual | Internal Medicine | 291 LINCOLN ST WORCESTER, MA 01605 (508) 799-2922 |
| 1356325047 | DR. LUIS A GARCIA M.D. Individual | Pediatrics | 291 LINCOLN ST SUITE 101 WORCESTER, MA 01605 (508) 752-7888 |
| 1679555817 | DR. WILLIAM W WOODRUFF M.D. Individual | Pediatrics | 291 LINCOLN ST SUITE 101 WORCESTER, MA 01605 (508) 752-7888 |
| 1326139668 | SUBHASH C. GULATI M.D F A C S, INC Individual | Surgery | 291 LINCOLN ST SUITE 204 WORCESTER, MA 01605 (508) 755-0770 |
| 1912273087 | NOSHEEN ALI ISHAQUE M.D. Individual | Internal Medicine | 291 LINCOLN ST WORCESTER, MA 01605 (508) 792-1788 |
| 1891179735 | ARMENIA MORDAN VASQUEZ MD Individual | Internal Medicine | 291 LINCOLN ST WORCESTER, MA 01605 (508) 799-2922 |
| 1710408463 | NASIFA NUR MD Individual | Internal Medicine | 291 LINCOLN ST WORCESTER, MA 01605 (508) 792-1788 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1639466592, enumerated in the NPI registry as an "individual" on June 29, 2011
The provider is located at 291 Lincoln St Worcester, Ma 01605 and the phone number is (508) 334-6251
The provider's speciality is Internal Medicine with taxonomy code 207RG0300X with a focus in Geriatric Medicine
The provider has more than 22 years of experience.
The provider might be accepting Accepts: Anthem Blue Cross and Blue Shield. 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 $177.36 with an average copayment of $44.34 for new patient appointments. Established patients should expect a typical charge of $103.48 and an average copayment of 25.87. Please review your insurance plan or contact the provider directly to determine your specific costs.
The most common procedures or services performed by this practitioner are: Extended inpatient or observation hospital service, first hour, Extended inpatient or observation hospital service, first hour, Follow-up nursing facility visit per day, typically 10 minutes, Follow-up nursing facility visit per day, typically 15 minutes, Follow-up nursing facility visit per day, typically 15 minutes, Follow-up nursing facility visit per day, typically 25 minutes, Follow-up nursing facility visit per day, typically 25 minutes, Follow-up nursing facility visit per day, typically 35 minutes, Follow-up nursing facility visit per day, typically 35 minutes, Initial nursing facility visit per day, typically 45 minutes and Nursing facility discharge management, more than 30 minutes.
This NPI record was last updated on June 29, 2011. 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].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.